There are 3 elements. This is meta phosphoric acid.
The oxidation number of phosphorus in HPO₃²⁻ is +5. The total charge of the ion is -2, and since there are 3 oxygen atoms with a charge of -2 each, the oxidation number of phosphorus must be +5 to balance the charges.
To find the oxidation number of each element in CH2Cl2, we look at the electronegativity of each element. Carbon typically has an oxidation number of +4, hydrogen +1, and chlorine -1. Hence, the oxidation numbers in CH2Cl2 would be +4 for carbon, +1 for each hydrogen, and -1 for each chlorine.
In MnCl2, the oxidation number of Mn is +2, as it is in the +2 oxidation state. The oxidation number of Cl is -1 each, as it is typically in the -1 oxidation state when bonded to metals such as manganese.
The oxidation number of Na in NaCl is +1, while the oxidation number of Cl in NaCl is -1.
In SO3, sulfur has an oxidation number of +6 and each oxygen atom has an oxidation number of -2. The sum of the oxidation numbers must equal the overall charge of the molecule, which in this case is 0.
The oxidation number of phosphorus in HPO₃²⁻ is +5. The total charge of the ion is -2, and since there are 3 oxygen atoms with a charge of -2 each, the oxidation number of phosphorus must be +5 to balance the charges.
To find the oxidation number of each element in CH2Cl2, we look at the electronegativity of each element. Carbon typically has an oxidation number of +4, hydrogen +1, and chlorine -1. Hence, the oxidation numbers in CH2Cl2 would be +4 for carbon, +1 for each hydrogen, and -1 for each chlorine.
In MnCl2, the oxidation number of Mn is +2, as it is in the +2 oxidation state. The oxidation number of Cl is -1 each, as it is typically in the -1 oxidation state when bonded to metals such as manganese.
The hydrogen atoms are each in the 1+ oxidation state. The oxygen is in it's 2- oxidation state.
The oxidation number of Na in NaCl is +1, while the oxidation number of Cl in NaCl is -1.
In SO3, sulfur has an oxidation number of +6 and each oxygen atom has an oxidation number of -2. The sum of the oxidation numbers must equal the overall charge of the molecule, which in this case is 0.
Na: +1 Cl: -1
In the oxalate ion (C2O4^2-), each carbon atom has an oxidation number of +3, and each oxygen atom has an oxidation number of -2. The net charge of -2 on the ion results in an overall oxidation number of -2.
The atomic number of an element is based on the number of protons in its nucleus, which is unique for each element. The oxidation number, on the other hand, is related to the charge that an atom carries in a compound or ion. The oxidation number does not directly determine the atomic number, as they are two distinct properties of an element.
In Na2B4O7, sodium (Na) has an oxidation number of +1, boron (B) has an oxidation number of +3, and oxygen (O) has an oxidation number of -2. To find the oxidation number of the whole compound, you can calculate it by adding up the oxidation numbers of each element. In this case, it would be (+1 * 2) + (+3 * 4) + (-2 * 7) = 0.
The oxidation number of fluorine in the fluorine molecule (F2) is 0. In a molecule composed of the same element (like F2), each atom has an oxidation number of 0.
The oxidation number of S in S8 is 0. Each sulfur atom in S8 has an oxidation number of 0 because it is in its elemental form and not bonded to any other element.