Final answer:
Element X from group 16 of the periodic table will form a 2- 2-charged anion to achieve a stable noble gas electron configuration through the gain of two electrons.
Step-by-step explanation:
Element X, which is in group 16 of the periodic table, will generally form an anion with a 2- 2 charge during a chemical reaction. This is because elements in group 16 have six valence electrons and tend to gain two more electrons to achieve a stable noble gas electron configuration. The acquisition of two additional electrons means the ion will have two more electrons than protons, resulting in a 2- -charge.
The usefulness of the periodic table in predicting likely ion formation and charge is evident. When nonmetal elements from group 16 interact in chemical reactions, they aim to attain the same electron configuration as the nearest noble gas. This is characterized by having eight electrons in their outermost shell, known as an octet, which is associated with chemical stability.