Oxidation Numbers

The oxidation number of the nitrogen atom in the cyanide ion (CN-) is -3. This is because carbon is more electronegative than nitrogen, so it takes the -1 oxidation state while nitrogen takes the -3 oxidation state to balance the overall charge of the ion.

The oxidation number of carbon in C2H4 (ethylene) is -3. This is because hydrogen has an oxidation number of +1 and there are 4 hydrogens in the molecule. The overall charge of the molecule is 0, so the oxidation number of carbon must be -3 to balance the charges.

The oxidation number of Cr in HCr2O7 is +6. This is because each oxygen atom has an oxidation number of -2, and there are four oxygen atoms in the dichromate ion (Cr2O7)^2-. The overall charge of the ion is -2, which means the two chromium atoms must have a total oxidation number of +12 to balance the charge, resulting in an individual oxidation number of +6 for each chromium atom.

The oxidation number of Cl in ClO2 is +3. This is because oxygen typically has an oxidation number of -2, and there are two oxygen atoms in ClO2, giving a total of -4. To balance the charge, Cl must have an oxidation number of +3.

No, the oxidation number of carbon in C6H12O6 is +4. Each of the six carbon atoms in glucose has an oxidation state of +4 because they are bonded to more electronegative elements (oxygen and hydrogen) which pulls electron density away from carbon.

The oxidation number of carbon in carbonate (CO3^2-) is +4. Oxygen has an oxidation number of -2, so the three oxygen atoms contribute a total of -6. To balance the charge of -2 for the entire carbonate ion, the carbon atom must have an oxidation number of +4.

0 in the elemental form, +3 and +4 are more common in its compounds.

The ammonium ion has net charge of +1. The central nitrogen atom is bonded to four hydrogen atoms which have oxidation status +1. The oxidation number of nitrogen is -3 after balancing the charges.

-1. In simple inorganic compounds other than peroxides and superoxides, oxygen almost always has an oxidation number of -2, but since calcium cations always have an oxidation number of +2, in this compound, the two oxygen atoms must have only -1 charge each. This compound is calcium peroxide, one of the exceptions noted above.

NaF2 is the chemical formula for sodium fluoride, which is a compound composed of sodium and fluoride ions. It is commonly used in toothpaste and water fluoridation to prevent tooth decay.

The oxidation number for Pt in PtO is +2. Oxygen typically has an oxidation number of -2, so the sum of the oxidation numbers in PtO must be zero since it is a neutral compound.

In H2PO4-, oxygen has the formal oxidation number -2, phosphorus has the formal oxidation number +5, and hydrogen has the formal oxidation number +1. The formal oxidation numbers for oxygen in almost all oxyanions and for hydrogen in almost all acid anions have these values, so that the remaining element can be assigned a formal oxidation number by the requirement of satisfying the total electrical charge if any shown in the formula.

The answer is +2 although understanding why is not so easy!

In compounds potassium is nearly always +1, so we have two of those in our compound giving +2.

Chlorine can exist in many oxidation states but as only oxygen and flourine are more electronegative than chlorine, and neither are present in our compound, we can assume that chlorine has the oxidation number of -1.

So we have two potassium (+1 x 2) and four chlorine (-1 x 4) this means that excluding the manganese atom we have a total of -2. In order for the compound to be balanced the manganese must be +2.

The oxidation number of osmium in OsO3F2 is +6. In osmium trioxide (OsO3), each oxygen atom has an oxidation number of -2, so the sum of oxidation numbers of all atoms in the compound must equal the charge of the compound which is zero. Since there are two fluorine atoms each with an oxidation number of -1 in OsO3F2, the oxidation number of osmium must be +6 to balance the charges.

The oxidation number of each oxygen atom in the perchlorate ion (ClO4-) is -2. Since the overall charge of the ion is -1, the oxidation number of chlorine must be +7 to balance out the negative charges from the oxygens.

Pb3O4 contains oxygen in the 2- oxidation state. and lead in the 2+ and 4+ oxidation states.

The chemical oxidation number for magnesium is +2 because it typically forms 2+ cations by losing two electrons. For bromine, the oxidation number can vary depending on the compound, but it commonly occurs as -1 in ionic compounds, like in magnesium bromide (MgBr2).

0 in elemental form and +1 in its compounds

This is the thiosulfate ion. Sulfur shows +6 oxidation number.

To figure this out, we first need to figure out the charge on S2O4.

We know that Na has a +1 charge, so the Na2 portion of the salt will have an overall +2 charge (2 x Na).

Provided that Na2S2O4 is a neutral molecule, we know that the charge of S2O4 must balance Na2, which has a +2 charge. Therefore, the charge on S2O4 is -2.

If the charge on S2O4 is -2, that must mean that there is an excess of 2 electrons in the molecule. We know that Oxygen usually has a charge of -2, and given that there are 4 Oxygen atoms in S2O4, the charge contributed by Oxygen is 4 x (-2) = -8. Since the charge of S2O4 is -2, we know that the total charge contributed by sulfur is +6.

+6 divided by 2 Sulfur atoms gives you the oxidation state (or number) of S: +3

The common oxidation number means any number that indicates the charge of atoms when an electron is either lost, gained, or shared in a chemical bond. It is known as the ion's number. Also, oxidation numbers in all atoms in a compound must add up to zero.

The oxidation number of tin in the compound Na2SnO2 is +2. This is because the total charge of the compound is 0 (since it is neutral) and the oxidation number of sodium is +1 and oxygen is -2. This means that the oxidation number of tin must be +2 to balance the charges.

No. The oxidation number is the charge on the atom of an element, or if the bonding is covalent, what that charge would be if that bonding were ionic.

A "molecule" with an electrical charge would be a polyatomic ion, not a molecule.