What happens to an element A if its atom gains two electrons?

The atom of an element ( not helium ) contains two electrons in its valence shell . How will the atom complete its octet ?

What will be formed when an atom 'A' gains two electrons?

In the formation of a compound AB, an atom of element A lost two electrons while an atom of element B gained two electrons. Predict two properties of AB.

What happens to number of valence electrons in atoms of elements as we go down a group of the periodic table ?

Which atom loses electron? Which atom gain electron?

What happens when an electron gains energy ?

A neutral atom of an element has two K, eight L, nine M and two N electrons then electronic configuration of the element is "________"

A neutral atom of an element has two K, eight L, nine M and two N electrons then electronic configuration of the element is "________"