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Question: Answered & Verified by Expert
Two nuclei A and B are isotonic with mass numbers 15 and 16 respectively. If A contains 7 protons, then the number of protons in B would be
PhysicsNuclear PhysicsNEET
Options:
  • A 7
  • B 8
  • C 9
  • D 10
Solution:
2517 Upvotes Verified Answer
The correct answer is: 8
A1=15

A2=16

N1=N2=N

Z1=7

A1=Z1+N

A2=Z2+N

15=7+N .......(i)

16=Z2+N .......(ii)

Equation (ii), (i)

Z2-7=1

Z2=1+7

Z2=8

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