Question

a. Two protons and two neutrons may bound to form a single particle it is called

1. α particle 

2. β particle

3. deuteron

4. triton 

b. If such a particle is emitted what changes will occur in the nucleus

c. The penetrating power of the particle is very small in air. Why?

d. If the particle is projected upward in a uniform magnetic field with direction perpendicular to plane in ward, towards which plate (A or B) it is deflected? To find this which law is applied?

Answer 1

a. 1. α particle.

b. Mass number decreases to 4 and atomic number decreases to 2

c. penetrating power of the particle is very small in air:

(i) Mass of α particle is

4. Hence penetrating power of the particle is small.

d. Towards A (left) Flemings left hand rule is used.