Question

define atomic mass and atomic number​

Answer 1

• Atomic Mass is the sum of all masses contained in an atom.
• It is denoted by Z .
• Z = Number of neutrons + Number of protons

• Atomic number is the number of protons contained in any atom. It is also the number of electrons in noble gases.
• It is denoted by A
• A = Number of protons = Number of electrons

Answer 2

Atomic mass or mass number is the total number of protons and neutrons present in the nucleus of the atom of an element.

Atomic number is the number of protons or electrons in the atom of an element.