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What is atomic mass ? and what is atomic number? |
| Answer» Atomic Number\tThe total number of protons in the nucleus of an atom gives us the atomic number of that atom.\tIt is represented with the letter ‘Z.’\tAll the atoms of a particular element have the same number of protons, and hence the same atomic number.\tAtoms of different elements have different atomic numbers.\tFor example, all carbon atoms have the atomic number of 6, whereas all atoms of Oxygen have 8 protons in their nucleus.Mass Number\tThe number of protons and neutrons combined to give us the mass number of an atom.\tIt is represented using the letter ‘A.’\tAs both protons and neutrons are present in the nucleus of an atom, they are together called nucleons.\tFor example, an atom of carbon has 6 protons and 6 neutrons. Thus, its mass number is 12.\tWhile the number of protons remains the same in all atoms of an element, the number of neutrons can vary. Thus, atoms of the same element can have different mass numbers, and these are called isotopes.\xa0 | |