How many protons z and how many neutrons n are there in a nucleus of the most common isotope of silicon, 2814si?

14 protons and  14 neutrons

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons = 14

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons = 28

Number of protons + Number of neutrons = 28

14 + Number of neutrons = 28

Number of neutrons = 14

Thus there are 14 protons and  14 neutrons in