Question

what is atomic mass and number

Answer 1

Atomic mass is 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.

Atomic number is 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.

Answer 2

ATOMIC MASS is the total number of protons and neutrons in an atom.
NO. OF PROTONS +NO. OF PROTONS = ATOMIC MASS.
eg.1.CARBON
no. fo protons + no. of neutrons = A.N
6 + 6 = 12
2.OXYGEN
protons + neutrons = A.N.
8 + 8 = 16
Atomic number: the total number of protons and electrons in an element is called its atomic number.

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