Q58 of 149 Page 193

What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.

(i) The no. of protons in one atom of an element is known as atomic no.

(ii) The total no. of protons and neutrons present in one atom of an element is known as mass no.


More from this chapter

All 149 →
57

Describe Bohr’s model of the atom. How did Neils Bohr explain the stability of atom?

 57

An element has an atomic number of 11 and its mass number is 23. What is the arrangement of electrons in the shells? State nuclear composition of an atom of the element.

 58

What is the relation between the atomic number and mass number of an element?

 58

If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?