Question

Atomic mass of element X with 8 electrons and 8 neutrons is.

• A. 8
• B. 16
• C. 24

Answer 1

The correct option is B 16

Mass number is the total number of protons and neutrons present in the nucleus of an atom. It is denoted by A.

For the given element X,
Number of electrons = 8
Number of electrons = Number of protons
Number of neutrons = 8
Mass number = Number of protons + number of neutrons
Therefore, mass number = 16