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Which of the following is least stable? ...

Which of the following is least stable?
a. `._(20)Co^(40)` b. `._(13)Al^(30)` c. `._(50)Sn^(119)` d. `._(25)Mn^(55)`

A

a. `._(20)Co^(40)`

B

b. `._(13)Al^(30)`

C

c. `._(50)Sn^(119)`

D

d. `._(25)Mn^(55)`

Text Solution

Verified by Experts

The correct Answer is:
b. `._(13)Al^(30)`
`._(13)Al^(30)`, odd number of protons and odd number of neutrons.
`p = 13, n = 30 - 13 = 17`.
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