As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom //ion

Options

A. kinectic energy decreases potential energy increases but total energy remain same
B. kinectic energy and total energy decreases but potential energy increases
C. in kinectic energy increases but potential energy and total energy decreases
D. kinectic energy potential energy and total energy decreases

Answer

C

Explanation

`U= - K (ze^(2))/(r ), T.E = - ((K)/(2) (ze^(2))/(r )`
`K.E = (K)/(2) (ze^(2))/(r )`, Here r decreases