What is the atomic number What is the atomic mass Define ele

What is the atomic number? What is the atomic mass? Define elements isotopes.

Solution

Atomic number:

the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.

Atomic mass:

the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

Isotopes:

The number of nucleons (both protons and neutrons) in the nucleus is the atom\'s mass number, and each isotope of a given element has a different mass number. For example, carbon-12, carbon-13 andcarbon-14 are three isotopes of the element carbonwith mass numbers 12, 13 and 14 respectively.