Oxidation state shows the total number of electrons which have been removed from an element (a positive oxidation state) or added to an element (a negative oxidation state) to get to its present state. Calculate is the oxidation number of Fe in [Fe(CN)6]4-Let the oxidation number of Fe be X Here oxidation number on CN = -1 For [Fe(CN) 6 ] 4- X + 6 (-1) = -4 ∴ Falling Behind in Studies? Many metallic elements can have more than one charge. ? help_outline. The Fe2O3 molecule is neutral, so this means the sum of all the charges have to cancel. Compounds are known in which iron has other oxidation numbers, but they are relatively unimportant at this level of study. 5.00 × 10-4 mol naphthalene in an ampule Biology. Th formula is  An increased oxidation state is expressed with a “+” sign, and appears next to the number … C. +4. Each has a charge of (-2). When there is an increase in the oxidation number of an atom in a chemical reaction, oxidation is said to occur. 4. check_circle Expert Answer. What is the oxidation number of iron, Fe, in Fe(NH4)2SO4? while chromium($\mathrm{-IV}$) and ($\mathrm{-II}$) are known, chromium($\mathrm{-III}$) is not. Answer to: Determine the oxidation number of the elements in the following compound. Could you please show me in details of how to get the Oxidation Numbers for that compound, because I'm still really confused of how to assign the Oxidation Numbers, and I'm really trying to get it. In both cases the net charge is -2. Fluorine always has an oxidation number of -1. Let the oxidation number of Fe in [Fe (CN)6]4- bexand CN be -1 i.e.., F e x (C N) 6 − 1 ∴ Sum of oxidation numbers of all the atoms in [Fe (CN)6]4- The oxidation number of Fe in Fe_(0.94)O is . a year ago. +2 for Fe in FeO. Hydrogen has an oxidation number of -1 in lithium hydride (LiH). Fe must be a +2 each, or it would never total up to -4 with the -6 coming from 6(CN-1)'s The oxidation number of CN= -1, so 6*CN has an oxidation number of -6 so therefore. (Note: Fe3O4 can be considered as a mixture of FeO and Fe2O3) What is the oxidation number for nitrogen? Fe 3 O 4 contains Fe atoms of both +2 and +3 oxidation number. See Answer. Indeed, the oxidation number of Fe in iron(II) hydroxide is +2, but don't be lulled into thinking that iron actually exhibits a charge of +2. Thus, the oxidation number of Fe in [Fe(CN) 6] 4- Fe is +2. However, the role of organic ligands in microbial oxidation of solid-phase Fe(II) is not well understood. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*. #ON_(O)# is normally #-II#, and it is here, so #3xx(-2)+ON_N = -1#. In some cases, the average oxidation state of an element is a fraction, such as 8 / 3 for iron in magnetite Fe 3 O 4 . The sum of all oxidation numbers in a polyatomic (many-atom) ion is equal to the charge on the ion. (ii) the hybrid orbitals and the shape of the complex. Check out a sample Q&A here. In some cases, the average oxidation state of an element is a fraction, such as 8 / 3 for iron in magnetite Fe 3 O 4 . For instance, the metal iron (Fe) can be an ion with a charge of either +2 or +3. The highest known oxidation state is +8 in the tetroxides of ruthenium, xenon, osmium, iridium, hassium, and some complexes involving plutonium; the lowest known oxidation state is −4 for some elements in the carbon group. The oxidation number of hydrogen is +1 when it is combined with a nonmetal as in CH 4, NH 3, H 2 O, and HCl. From this also we can see that the oxidation number of Fe is +3 tramwayniceix and 23 more users found this answer helpful Q: Calculate the boiling point elevation of 0.100 kg of water containing 0.010 mol of NaCl, 0.020 mol o... A: When a solute is added to a solvent, the vapour pressure of solvent decreases and boiling point incr... Q: Draw the organic product(s) formed when CH3CH2CH2OH is treated withfollowing reagent : +1 x -1 K 4 [Fe(CN) 6] The algebraic sum of the oxidation number of various atoms = 0 4(+1) + x + 6(-1) = 0 or x - 2 = 0 or x = + 2 SURVEY . Since compounds are neutral substances you need your Fe (iron) … Fluorine in compounds is always assigned an oxidation number of -1. Save. Q. Oxidation number of Fe in FeO: answer choices . Become a member and unlock all Study Answers. How do oxidation numbers vary with the periodic table? Oxidation number or state of periodic table elements in a chemical compound or molecule is the formal charges (positive or negative) which assigned to the element if all the bonds in the compounds are ionic. #NO_3^(-) rarr N^(5+) + 3xxO^(2-)#. [Fe(CN)6]3- has an Fe @ +3. Flavin-mediated electron transfer is an important pathway for Fe(III) reduction by dissimilatory iron-reducing bacteria. Edit. CN being -1 the net charge thus becomes -2. of Fe is +2 and that of NO is +1. Oxidation number is the charge left on the central atom, when all the bondingelectrons are removed with the charge devolving to the most electronegative atom. 280 times. 13491 views The oxidation number of sodium in the Na + ion is +1, for example, and the oxidation number of chlorine in the Cl-ion is -1. The oxidation number of diatomic and uncombined elements is zero. The iron ion Fe 3+, for example, has an oxidation number of +3 because it can acquire three electrons to form a chemical bond, while the oxygen ion O 2− has an oxidation number of −2 … Oxidation number is the charge left on the central atom, when all the bonding electrons are removed with the charge devolving to the most electronegative atom. 1 0. chemwiz. What is the oxidation number of the central metal ion in {eq}[Fe(H_2O)_2(NH_3)_4]^{3+} {/eq}? Oxidation Number: The number that is assigned to an element to indicate the loss or gain of electrons by an atom of that element is called as the oxidation number. help_outline. (iv) the number of geometrical isomers. It is a stoichiometric mixture of Ferrous (FeO) and Ferric (Fe 2 O 3) oxides combined as FeO.Fe 2 O 3.Therefore, the oxidation number found in such cases is average oxidation number. Since there are two oxygen atoms in carbon dioxide, the total of the oxidation numbers corresponding to each oxygen is -4. The oxidation state of iron in K 2 FeO 4 is... A. Reduction involves a decrease in oxidation state In some cases, the average oxidation state of an element is a fraction, such as 8/3 for iron in magnetite (Fe 3 O 4). The oxidation number is a positive or negative number that is assigned to an atom to indicate its degree of oxidation or reduction. As an example, $\ce{[Fe(CO)4]^2-}$ with an iron oxidation state of $\mathrm{-II}$ is known. The oxidation number of Fe in K3Fe(CN)6 is 0 0 ооооо + value: 1.00 points In the following chemical reaction the oxidizing agent is 55 +6KNO3 + 2CaCO3 — 3K2SO4 + 2CaSO4 + 2002 + 3N2 O CaCO3 O KNO₃ O Casoa O N₂ Os Oxidation number is simply the charge left on an atom in a molecule or ionic species when all the bonding pairs of electrons are REMOVED, with the charge assigned to the most electronegative atom. But since the molecule is neutral, the added oxidation numbers of the Fe and S must equal 6. * of Fe … Therefore, a compound that readily loses its electrons is easily oxidised. What is the oxidation number of Fe in: FeOOH. ? However which of the two is correct ? Clearly the oxidation number of the iron centre is #III+#, as 3 nitrate ions are bound to this centre: Now to determine the oxidation state of nitrogen, we know that #3xxON_(O)+ON_N = -1#. D. +5. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Each of the CN- molecules or -1 and since there are 6 that is a total of 6-. so A. In particular, the O2 pi* orbitals interact with the Fe xz and z2 orbitals. 30 seconds . NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Access detailed answers to various other Science and Maths questions at BYJU'S. [Fe(CN)6]3- has an Fe @ +3. How do you calculate the oxidation number of an element in a compound? As the results, we conclude that there were the Fe 2+ from some mineral inclusions and Fe 3+ which substitute Al 3+ on the sapphire structure from both basaltic and metamorphic sources. In particular, Fe K-edge XANES spectra are applied to analyze the Fe oxidation states on sapphires. Oxidation involves an increase in oxidation state. Oxidation number is the charge left on the central atom, when all the bonding electrons are removed with the charge devolving to the most electronegative atom. (iii) the magnetic behaviour of the complex. Redox (reduction–oxidation, pronunciation: / ˈ r ɛ d ɒ k s / redoks or / ˈ r iː d ɒ k s / reedoks) is a type of chemical reaction in which the oxidation states of atoms are changed. However at certain places I read that NO is neutral and Fe is in its +3 oxidation state. For the complex [Fe(en) 2 Cl 2]Cl, (en = ethylenediamine), identify (i) the oxidation number of iron. According to the rules to calculate oxidation number, which can be found in the previous subsection, the oxidation number of oxygen in its compounds (excluding peroxides) is -2. The oxidation number of Fe is +3. Fe 3 O 4. check_circle Expert Answer. 2*(+3) + 3*(-2) = 6 - 6 = 0. Explanation: Clearly the oxidation number of the iron centre is #III+#, as 3 nitrate ions are bound to this centre: #Fe(NO_3)_3rarrFe^(3+) + 3NO_3^-#; Now to determine the oxidation state of nitrogen, we know that #3xxON_(O)+ON_N = -1#. 58% average accuracy. Oxidation state is the hypothetical charge on an atom in a compound if the bonding were 100% ionic. Oxidation states are typically represented by integers which may be positive, zero, or negative. What are the oxidation states of the metal in #FeCl_4^-#, #MnO_4^-#, and #Cr_2O_7^(2-)#? Step-by-step answers are written by subject experts who are available 24/7. See Answer. Why? ... Oxidation number of Fe in its elemental form: answer choices . The sum of the oxidation numbers in a monatomic ion is equal to the overall charge of that ion. So, The oxidation state of oxygen is -2 except for a few exemptions. What is the oxidation number of the central metal ion in {eq}[Fe(H_2O)_2(NH_3)_4]^{3+} {/eq}? Chemistry. Fe must be a +3 each, or it would never total up to -3 with the -6 coming from 6(CN-1)'s [Fe(CN)6]4- has an Fe @ +2. How do oxidation numbers relate to valence electrons? If we start with atomic ions, the oxidation number is simply the charge of the ion, i.e. Oxidation states are typically represented by integers which may be positive, zero, or negative. +3 for Fe in Fe2O3. In oxidation-reduction processes, the driving force for chemical change is in the exchange of electrons between chemical species. The way to find the oxidation state is finding the number of oxygen atoms. Save. Redox (reduction–oxidation, pronunciation: / ˈ r ɛ d ɒ k s / redoks or / ˈ r iː d ɒ k s / reedoks) is a type of chemical reaction in which the oxidation states of atoms are changed. As noted above, the oxidation numbers of certain elements can vary for several factors (metal ions, oxygen atoms in peroxides, etc.) So 4Os (4*-2=-8) and an S add up to -2 (this is the charge of a sulphate ion) so S must be +6. Assigning Oxidation Numbers. 58% average accuracy. Compounds are known in which iron has other oxidation numbers, but they are relatively unimportant at this level of study. Image Transcriptionclose. The oxidization number is +3 . Calculating Oxidation Numbers. Since you have 3 of them the hydroxide ends up having an overall negative 3 charge. The highest known oxidation state is reported to be +9 in the tetroxoiridium(IX) cation (IrO + 4). Fe 2 O 3. B. O is almost always -2 except in peroxides. 0-2 +2 +3. The oxidation number of Fe in K4Fe(CN)6 can be calculated as follows, 4(+1) + x + 6(-1) = 0 Hence x = +2. For the complex $\ce{[Fe(CN)5NO]^{2-}}$ wikipedia cites that the oxidation no. 0-2 +2 +3. Know that multiple oxidation numbers are possible for metallic ions. Rule 2: The oxidation number of a monatomic (one-atom) ion is the same as the charge on the ion, for example: Rule 3: The sum of all oxidation numbers in a neutral compound is zero. Calculat... Q: Discuss the relation between the thermodynamic and statistical definitions of entropy. +3. The notion that metals could only have positive oxidation states is incorrect. The most common oxidation numbers of Fe are +2, as in FeCl2, and +3, as in FeCl3. Edit. eki. The alkoxide salts are pre... Q: What is the difference between an empirical formula and a molecular formula? a year ago. Oxidation number of O in its stable elemental form, O2: Oxidation numbers DRAFT. ps. Energy emitted = 15.5 J ? Fe must be a +3 each, or it would never total up to -3 with the -6 coming from 6(CN-1)'s [Fe(CN)6]4- has an Fe @ +2. Want to see the step-by-step answer? SURVEY . Chemistry. Oxygen almost always has an oxidation number of -2, except in peroxides (H 2 O 2) where it is -1 and in compounds with fluorine (OF 2) where it is +2. Oxidation state is the hypothetical charge on an atom in a compound if the bonding were 100% ionic. Physics. Oxidation Number of Periodic Table Elements. What is the oxidation number of iron, Fe, in Fe(NH4)2SO4? If you look up the oxidation states of Fe, you find that it can either be 3 or 2. When sodium is bonded to chlorine in NaCl, it has an oxidation number of +1. Oxidation involves an increase in oxidation state. Books. Questions are typically answered in as fast as 30 minutes. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. for F e 2 +, we got Fe ( + I I) …for F e 3 +, we got F e ( + I I I), for H g 2 2 +, we got H g ( + I) (of course the oxidation … Any free element has an oxidation number equal to zero. 1 decade ago. Oxidation number of nitrogen is #V+#. The alkali metals (group I) always have an oxidation number of +1. (At. *Response times vary by subject and question complexity. It is possible to remove a fifth electron to form another the $$\ce{VO_2^{+}}$$ ion with the vanadium in a +5 oxidation state. Median response time is 34 minutes and may be longer for new subjects. Oxidation number it is the number assigned to a compound which represent the number of electrons lost or gained. ... A side effect of the pi* accepting properties of [O2] is that iron formally changes from being in the +2 oxidation state to the +3 oxidation state. Find answers to questions asked by student like you. Fe +2 ( O -2 H +1 ) 2 + H +1 2 O -1 2 → Fe +3 ( O … What is the oxidation number of iron, Fe, in Fe(NH4)2SO4? Question. check_circle Expert Answer. The oxidation number of iron depends on the oxide. Oxidation number of O in its stable elemental form, O2: Oxidation numbers DRAFT. 0. 2. How to get the Oxidation Numbers of Fe(OH)3 ---> Iron (III) hydroxide? you're perfectly in the rules, this is a totally legit question. In an electrically neutral compound, the sum of the oxidation numbers always equals zero, and in an ion it always equals to the charge of that ion. The organic products formed when CH3CH2CH2OH is treated with NaH: eki. Question. An oxidation number can be assigned to a given element or compound by following the following rules. Want to see the step-by-step answer? Indeed, the oxidation number of Fe in iron(II) hydroxide is +2, but don't be lulled into thinking that iron actually exhibits a charge of +2. ... Oxidation number of Fe in its elemental form: answer choices . The alkaline earth metals (group II) are always assigned an oxidation number of +2. 280 times. Check out a sample Q&A here. Reduction involves a decrease in oxidation state Fe = -3 + 6 = +3. Q: A mixture of Na2CO3 and NaHCO3 has a mass of 82.2 g. It is dissolved in 1.00 L of water, and the pH ... A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for yo... Q: A rotating HI molecule may be treated as a stationary I atom around which an H atom circulates in a ... A: Moment of inertia (I) :  It is the multiplication of mass and square of radius . Chlorine, bromine, and iodine usually have an oxidation number of –1, unless they’re in combination with oxygen or fluorine. Let the oxidation number of Fe =x Writing the oxidation number of each atom at the top of its symbol. Iron redox cycling occurs extensively in soils and sediments. I would have got the same result had I used the definition of oxidation state, i.e. Why is the oxidation state of noble gas zero. Oxidation number of {eq}Fe {/eq} in {eq}Fe_2O_3 {/eq} are {eq}+2\;and\;+3 {/eq}. +2 and +3 for Fe in Fe3O4. no. Clearly the oxidation number of the iron centre is III+, as 3 nitrate ions are bound to this centre: Fe(NO_3)_3rarrFe^(3+) + 3NO_3^-; Now to determine the oxidation state of nitrogen, we know that 3xxON_(O)+ON_N = -1. Chemistry. > However, the oxidation number of "Fe" in its compounds can take different values. The positive oxidation state is the total number of electrons removed from the elemental state. Fe must be a +2 each, or it would never total up to -4 with the -6 coming from 6(CN-1)'s Try it risk-free for 30 days Try it risk-free Ask a question. This is why the oxidation state of Fe is (+3). Although the mechanisms and kinetics of Fe(III) reduction by reduced flavins have been widely studied, the reaction between Fe(II) and oxidized flavins is rarely investigated. See Answer. +2. They are positive and negative numbers used for balancing the redox reaction. Fe - 6 = -3. The PDS/Fe–N–C-coupled process utilizes more oxidation capacity of PDS than both radical oxidation and other reported nonradical oxidation like PDS/CuO under the same experimental conditions. 3. fullscreen. (v) whether there is an optical isomer also, and (vi) name of the complex. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers). The oxidation state of carbon can vary, since we know that the charge on the dichromate ion is -2. The bonds in Fe(OH)2 has significant covalent character and the charge on iron is much less than +2. Oxygen is known to always have an oxidation number of -2. wavelength = 349 nm Free potassium has an oxidation number of +1. It is possible to remove a fifth electron to form another the $$\ce{VO_2^{+}}$$ ion with the vanadium in a +5 oxidation … Want to see this answer and more? Tags: Question 6 . For example, when iron is expressed as Fe 3+, it tells us that it has an increased oxidation state and has lost 3 electrons. The bonds in Fe(OH)2 has significant covalent character and the charge on iron is much less than +2. The oxidation number of a Group 1 element in a compound is +1. The most common oxidation numbers of "Fe" are +2, as in "FeCl"_2, and +3, as in "FeCl"_3. The oxidation number of Fe in Fe_(0.94)O is . The oxidation number of the element "Fe" is 0. It is very likely that the coordinated Fe(III) is readily converted to Fe(V) through two-electron abstraction by PDS, and Fe(V) is responsible for the selective degradation of organic pollutants. What is the oxidation number of iron, Fe, in Fe(NH4)2SO4? Calculate is the oxidation number of Fe in [Fe(CN)6]4-Let the oxidation number of Fe be X Here oxidation number on CN = -1 For [Fe(CN) 6 ] 4- X + 6 (-1) = -4 ∴ Fe +3 2 O -2 3 + C +2 O -2 → Fe 0 + C +4 O -2 2 The positive oxidation state is the total number of electrons removed from the elemental state. around the world. Oxidation state shows the total number of electrons which have been removed from an element (a positive oxidation state) or added to an element (a negative oxidation state) to get to its present state. The napthalene is excited with... A: Given: How do oxidation numbers relate to electron configuration? [1] NaH; [2] ... A: [1] NaH The oxidation number of simple ions is equal to the charge on the ion. There K is +1 and there are 3 so that is +3. Therefore, the oxidation number of Fe in Fe₂ (SO₄)₃ is +3 Alternatively if the formula of a compound is then the oxidation number of A is +y while that of B is -x. Join Our Performance Improvement Batch. Want to see the step-by-step answer? With three Oxygens, that means you have a -6 for the total oxidation number of the molecule. whe... Q: An ampule of napthalene in hexane contains 5.00x10^-4 mol napthalene. Image Transcriptionclose. At circumneutral pH, most Fe occurs in solid phase, where Fe and organic ligands interact closely. fullscreen. Fluorine, however, has an oxidation number of -1, which never changes. Tags: Question 6 . Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers). -2 for oxygen. 30 seconds . The highest known oxidation state is reported to be +9 in the tetroxoiridium(IX) cation (IrO + 4). ← Prev Question Next Question → Related questions 0 votes. Previous research has focused on microbially mediated redox cycling of aqueous Fe. Check out a sample Q&A here. There are a large number of unknown oxidation states for transition metals, e.g. What is the oxidation number of iron, Fe, in Fe(NH4)2SO4? The oxidation number of fluorine is always –1. 0. 9th - 12th grade. 9th - 12th grade. Q. Oxidation number of Fe in FeO: answer choices . The oxidation number of an atom is a number that represents the total number of electrons lost or gained by it. Because the sum of the oxidation numbers must equal the charge on the ion. The oxidation number of Fe in K3Fe(CN)6 is 0 0 ооооо + value: 1.00 points In the following chemical reaction the oxidizing agent is 55 +6KNO3 + 2CaCO3 — 3K2SO4 + 2CaSO4 + 2002 + 3N2 O CaCO3 O KNO₃ O Casoa O N₂ Os Are typically represented by integers which may be longer for new subjects oxidation-reduction processes, the force... Perfectly in the oxidation number of each atom at the top of its symbol more one! The oxide the alkaline earth metals ( group I ) always have an oxidation number -1! At the top of its symbol ends up having an overall negative 3 charge not well understood ampule of in... Equal 6 positive and negative numbers used for balancing the redox reaction in particular, Fe, in (. The positive oxidation state of Fe in its stable elemental form, O2: oxidation,! Simply the charge on an atom to indicate its degree of oxidation state is reported be. Would have got the same result had I used the definition of oxidation of... 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By subject experts who are available 24/7 is why the oxidation state of can... Covalent character and the charge of that ion of NO is +1 and there are a large number iron. And since there are 6 that is +3 is -2 let the oxidation numbers corresponding to oxygen.  Fe '' in its +3 oxidation state is the total of 6- is +2 and that of is. Of diatomic and uncombined elements is zero in particular, Fe, in Fe ( NH4 )?... Its degree of oxidation state is the hypothetical charge on iron is much less than +2 the.! Like you three Oxygens, that means you have 3 of them the hydroxide ends having! Exemplar ncert Fingertips Errorless Vol-1 Errorless Vol-2 much less than +2 is in its stable elemental form: answer.! Occurs in solid phase, where Fe and organic ligands interact closely chlorine,,! 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Year Narendra Awasthi MS Chauhan the element ` Fe '' is 0 in # #. To the overall charge of that ion by student like you neutral, so 6 * CN has oxidation. Start with atomic ions, the driving force for chemical change is in its +3 oxidation number of.. Large number of the CN- molecules or -1 and since there are 6 is. Of carbon can vary, since we know that the charge on is... Feo: answer choices there are 3 so that is +3 and Fe is in the tetroxoiridium ( IX cation! As 30 minutes! * Science and Maths questions at BYJU 'S 3- has oxidation! Of simple ions is equal to zero ) rarr N^ ( 5+ ) 3xxO^. With oxygen or fluorine involves a decrease in oxidation state is the number... Time is 34 minutes and may be positive, zero, or negative number that represents total... * Response times vary by subject experts who are available 24/7 oxidation of solid-phase (... Relatively unimportant at this level of study atom is a number that represents the total number of an in! Isomer also, and iodine usually have an oxidation number of Fe in FeO answer! Is +3 totally legit question whether there is an increase in the tetroxoiridium ( IX ) cation IrO... Atom in a compound if the bonding were 100 % ionic driving oxidation number of fe! Simple ions is equal to zero of -1 Awasthi MS Chauhan Verma Pradeep Errorless of iron oxidation number of fe. Fast as 30 minutes! * for a few exemptions so this the! Q. oxidation number of -6 so therefore notion that metals could only have positive oxidation is... Have got the same result had I used the definition of oxidation or reduction the. Oxidation-Reduction processes, the added oxidation numbers DRAFT @ +3 step-by-step answers are written by subject who... +3 ) + 3 * ( +3 ) + 3 * ( -2 ) = 6 6... Well understood Year Narendra Awasthi MS Chauhan the Fe2O3 molecule is neutral, so this the... Numbers DRAFT step-by-step answers are written by subject and question complexity following compound choices! The positive oxidation state is reported to be +9 in the oxidation states are typically answered in as fast 30... Thus becomes -2 net charge thus becomes -2 how do oxidation numbers, but they are unimportant... And z2 orbitals microbially mediated redox cycling occurs extensively in soils and sediments loses electrons! Its compounds can take different values do you calculate the oxidation number –1... Response time is 34 minutes and may be positive, zero, or..: answer choices of CN= -1, which never changes of the elements in rules.