Question

11. The Element magnesium has atomic number 12 and mass number 24.

a) How many electrons are present in a magnesium atom
b) Find the total number of particles procent in the nucleus of magnesium

c) How many shells are there in which electron are present?​

Answer 1

Answer:

a) 12 electrons

b) 12 protons 12 neutrons

c) 3 shells are required that is 2,8,2

Explanation:

a) No of electrons in an neutral element is equal to the atomic number(Z) that is = 12 electrons.

b) Total number of particles in the nucleus are 12 protons and 12 neutrons = 24 particles.

c) No of shells in which electrons are there are 2,8,2.