Question

Emission of $\beta$-particles by an atom of an element results in the formation of:

• A. isobar
• B. isomer
• C. isotope
• D. isotone

Answer 1

The correct option is A isobar

Emission of $\beta$-particle changes only the atomic number keeping atomic mass constant.

${}_Z^{A}X⟶{}_{Z+1}^{A}Y+{\beta }^{-}$

Two elements with different atomic numbers but same mass number are called isobars.