Which number indicates the number of atoms of each element in a molecule of a substance.?

Answer 1

If there is only one atom, there will not be a number. Otherwise, they are the numbers which are normally written in subscript after the symbol for the element.

Answer 2

It is the subscripts in a chemical formula that tell us how many atoms of a given element are in a molecule. Let's look at a few examples. In table salt, NaCl, there are no subscripts. We assume that there is one atom of each element (sodium and chlorine) in this compound when we see no subscript. Carbon monoxide, CO, has 1 atom of carbon (C) and 1 atom of oxygen (O) in each molecule. Same reasoning. In H2O, which you recognize as water, there are 2 hydrogen atoms and 1 oxygen atom in each molecule. Calcium chloride, CaCl2, has 1 atom of calcium (Ca) and 2 atoms of chlorine (Cl) in each molecule. In sulfuric acid, H2SO4, we see 2 atoms of hydrogen (H), 1 atom of sulfur, and 4 atoms of oxygen. You can use the same logic to "decode" a compound associated with fertilizers and explosives, ammonium nitrate, which is NH4NO3. It has 2 nitrogen atoms, 4 hydrogen atoms, and 3 oxygen atoms in it. And the toxic compound associated with poisons for rodents and other pests, ammonium nitrite, NH4NO2, we see it has 2 nitrogen atoms, 4 hydrogen atoms, and 2 oxygen atoms. Simple and easy. Let's get tough. In ammonium carbonate, (NH4)2CO3, which is the old "smelling salt" we used to revive a person who has fainted, we see the ammonium radical, which is NH4, used not once but twice in the molecule. There are two of these radicals along with the carbonate radical, which is the CO3, in the molecule. When we have the parens around a radical, as we do here with the ammonium radical, the NH4, we have to multiply each subscript insidethe paren by the number outside. We have a 2 outside, and there is the 1 nitrogen (N) atom (no subscript), and 4 hydrogen (H) atoms inside the paren. That means there are 2 nitrogen atoms and 8 hydrogen atoms in this molecule, along with the carbon atom and the 3 oxygen atoms. Not much of a stretch to cover this last bit, and now you have the tools to "decode" chemical formulae and find out how many atoms of each element are in it.

Answer 3

In a chemical formula there are two numbers, the subscript and the coefficient. The coefficient gives the number of total molecules and the subscript shows how many atoms there are in each molecule.no

Answer 4

Well, first of all, you need a chemical equation. In the chemical equation, there will be a number infront of a few letters. like 2fe which is 2 iron or 9CO2 which is 9 carbondyoxide. hope that helped nextime make a more specific question

Answer 5

The subscript number in a chemical formula indicates the number of atoms of each element in a molecule of a substance.

Answer 6

the script number to the right of the element indicates the number of atoms

Answer 7

This is the subscript in the chemical formula.

Answer 8

Avagodro's number which is 6.02x10^23

Answer 9

Subscript

Answer 10

subscript.