Question

(a). Write the basic nuclear process involved in the emission of β⁺ in a symbolic form, by a radioactive nucleus. 

(b).In the reactions given below : 

(i). \(^{11}_6C\) → \(^{Z}_YB\) + x + v

(ii). \(^{12}_6C\) + \(^{12}_6B\) → \(^{20}_aNe\) + \(^{c}_bHe\) 

Find the values of z, y and x and a, b& c.

Answer 1

(a) For beta plus decay, 

A proton transforms into a neutron within the nucleus, according to :

P → n + e⁺ + v;

v = neutrino

Example of B⁺ decay :

\(_{11}Na^{22}\) → \(_{10}Ne^{22}\) + e⁺ + v 

Infect, 

Lighter radioactive isotopes with Z < 70 decay mostly by beta plus decay.

(b) (i). \(^{11}_6C\) → \(^{Z}_YB\) + x + v 

x : positron 

⇒ ₊₁e⁰ 

∴ Y = 5, Z = 1

(ii). \(^{12}_6C\) + \(^{12}_6B\) → \(^{20}_aNe\) + \(^{c}_bHe\)

b = 2, c = 4 

a = 10