# Which of the following nuclei would be the least stable

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## Question:

Which of the following nuclei would be the least stableA 2 protons, 2 neutrons
B 1 proton 1 neutron
C 1 proton 3 neutrons
D 1 proton 2 neutrons

C. 1 proton 3 neutrons

Explanation:

A nucleus is more stable if the ratio of the neutrons to protons is between 1:1 and 1:1.5.

Thus the ratios of neutrons to protons for  the nuclei are as follows

A- 1:1

B- 1:1

C- 1:3

D- 1:2

Among these ratios, C is the greatest thus the nucleus is the least stable.

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