# A mercury atom in the ground state absorbs 20.00 electronvolts energy and is ionized by losing an electron. How much energy does this electron have after the ionization?

Jul 16, 2018

After the ionization, the electron has $\text{9.563 eV}$ of energy.

#### Explanation:

The kinetic energy $\left(\text{KE}\right)$ of a particle is equal to the difference between its absorbed energy $\left(\text{AE}\right)$ and its ionization energy $\left(\text{IE}\right)$.

The first ionization energy of $\text{Hg}$ is $\text{10.4375 eV}$. The absorbed energy is $\text{20.00 eV}$.

$\text{KE"="AE"-"IE}$

$\text{KE"="20.00 eV"-"10.4375 eV"="9.56 eV}$ rounded to two decimal places