Question

(Inorganic chemistry)- Protons and neutrons are nucleons, and the sum of the nucleons is the mass number of a nuclide

a.) Consider combining a fixed number of nucleons(6) to form various nuclides. List all possible nuclides and describe their stability.

Answer 1

number of nucleons(6)

The following possibility exist

p n example n/p

1 5 ⁶H (least stable) 5

2 4 ⁶He (stable, half-life of 806.7 milliseconds)   2

3 3   ⁶Li (stable) 1

4 2   ⁶ Be (least stable)   0.5

5 1 no example exists    0.2

As above shown, among ⁶H,⁶He, ⁶Li, ⁶Be, the ⁶H, and ⁶Be are least stable and ⁶H and ⁶Li are stable. This may be also predicted by considering the of n/p ratio which states that -

The nucleus is unstable if the neutron-proton ratio is less than 1:1 or greater than 1.5