answer each question about the following atom when it becomes an ion. selenium determine the ionic name…

Explanation:

Step1: Recall selenium's position

Selenium is in group 16 of the periodic table. Non - metals in group 16 gain electrons to achieve a stable octet.

Step2: Determine the ion name

When selenium gains electrons to form an ion, it is called a selenide ion.

Step3: Write the chemical symbol and charge

Selenium has the symbol Se. Since it gains 2 electrons, the ion has a charge of 2-. So the chemical symbol with charge is $Se^{2 - }$.

Step4: Explain the charge formation

An atom becomes negatively charged by gaining electrons. Selenium gains 2 electrons to achieve a stable electron configuration, resulting in a 2 - charge.

Answer:

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