Question

Count the atomic number and atomic mass number of NA [Electrons -11,Neutron -12

Answer 1

TOPIC :- ATOMIC STRUCTURE

CONCEPT :- In a neutral atom, number of electron = number of proton = atomic number. Atomicass number is the sum of number of protons and number of neutrons in the nucleus of an atom.

SOLUTION :-

Given, Number of electrons in Na = 11.

Thus, number of proton = 11.

Hence, atomic number = 11

Atomic Mass number = no. of proton + no. of neutron

= 11 + 12 = 23.

Hence, mass number of Na is 23.