Question

$\left({}_{32}G{e}^{76},{}_{34}S{e}^{76}\right)$ and $\left({}_{14}S{i}^{30},{}_{16}{S}^{32}\right)$ are the examples of-

• A. Isotopes and isobars
• B. Isobars and isotones
• C. Isotones and isotopes
• D. Isobars and isotopes

Answer 1

Answer: (B)

Number of neutrons $=M-A$

Number of neutrons in ${}_{14}S{i}^{30}=30-14=16$

Number of neutrons in ${}_{16}S{i}^{32}=32-16=16$

Because of the presence of same number of neutrons,

${}_{14}S{i}^{30}$ and ${}_{16}{S}^{32}$ are called isotones.

Hence; ${}_{32}G{e}^{76},{}_{34}S{e}^{76}$ and

${}_{14}S{i}^{30}$ and ${}_{16}{S}^{32}$ are isobars and isotones.