Question

What is the mass number of an atom that contains 12 protons, 14 neutrons, and 12 electrons? *

10 points
2
26
24
168

Answer 1

The mass number of an atom : 26

Further explanation

Given

12 protons, 14 neutrons, and 12 electrons

Required

The mass number

Solution

Inside the atom there are 3 sub-particles, namely protons, neutrons and electrons. Protons and electrons are present in the atomic nucleus while electrons move around the atomic nucleus through energy levels in the atomic shell

Atomic number = number of protons = number of electrons

Mass number = number of protons + number of neutrons

Input the value :

Mass number = 12 + 14

Mass number = 26