Physics

A nucleus $_{11}^{24}\text{Na}$ is β-radioactive.
(a) What are the numbers 24 and 11 called?
(b) Write the equation representing β-decay.
(c) What general name is given to the product nucleus with respect to $_{11}^{24}\text{Na}$ .

Radioactivity

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Answer

(a) The number 24 is called the mass number and the number 11 is called the atomic number.

(b) The equation representing β-decay is as follows —

$_{11}^{24}\text{Na} \longrightarrow \space _{12}^{24}\text{Mg} + _{-1}^{\space \space\space 0}\text{e}$

(c) The product nucleus is called the isobar because they have same mass number and different atomic number.

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