Question

Please provide the complete solution

Answer 1

Answer:

-1.5eV

Explanation:

Energy is given by the equation;

$e = - 13.6\times \frac{z}{ {n}^{2} }$

where,

$z = atomic \: number$

$n = subshell \: level \:$

here,

$z = 1 \: \: \: and \: \: \: n = 3$

so we get,

$e = - 1.5ev$