Question

selenium
determine the ionic name.
write the chemical symbol and charge.
the ionic charge of is achieved when the atom electrons.

Explanation:

Step1: Determine the ionic name

Selenium is a non - metal in group 16 of the periodic table. Non - metals gain electrons to form anions. The ionic name of selenium is selenide.

Step2: Write the chemical symbol and charge

The chemical symbol of selenium is Se. When it forms an ion, it gains 2 electrons to achieve a stable octet. So the ion is $Se^{2 - }$.

Step3: Explain how the ionic charge is achieved

The ionic charge of $Se^{2 - }$ is achieved when the atom gains 2 electrons.

Answer:

Ionic name: Selenide
Chemical symbol and charge: $Se$, $2 - $
The ionic charge of $Se^{2 - }$ is achieved when the atom gains 2 electrons.