Question

$C^{14}$ exists in atmosphere due to :

• A. conversion of $C^{12}$ to $C^{14}$
• B. bombardment of atmospheric nitrogen by cosmic ray neutrons.
• C. combustion of fossil fuel
• D. none

Answer 1

The correct option is B bombardment of atmospheric nitrogen by cosmic ray neutrons.

C-14 exists in atmosphere due to bombardment of atmospheric nitrogen by cosmic ray neutrons.
${}_7{N}^{14}{+}_0{n}^1{\to }_6{C}^{14}{+}_1{H}^1$