Question

How many neutrons are there in ${}_{38}^{88}$Sr?

• A. 38
• B. 50
• C. 126
• D. 88

Answer 1

Answer: (B)

50

Answer 2

: ${}_{38}^{88}Sr$

Atomic number = No. of protons= No. of electrons = 38 Atomic mass = 88

Number of neutrons = 88 – 38 = 50