Question

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

• A. $38$
• B. $50$
• C. $126$
• D. $88$

Answer 1

Answer: (B)

In ${}_{38}^{88}Sr$
Atomic number = No. of protons $=$ No. of electrons $=38$
Atomic mass $=88$
Number of neutrons $=88-38$
$=50$