Question

b) The atomic number of sodium is 11. Its mass number is 23.
How many protons and neutrons are present in a sodium atom?
Draw the diagram of a sodium atom.​

Answer 1

Answer:

no. of proton = 11

no. of neutron = 12

Explanation:

we know,

no. of proton = no. of elctron

Thus, no. of proton = 11

we know,

mass number = no. of protons + no. of neutrons

Therefore, no. of neutron = 23 - 11 = 12