$A$ covalent bond between two atoms is formed by which of the following?

In a molecule of phosphorus $(V)$ oxide,there are

When two pairs of electrons are shared,the bond is

According to recent research,carbon suboxide $(C_3O_2)$ is a component of the atmosphere of Mercury. What is the Lewis structure of carbon suboxide in its ground state?

Which is true for $SF_6$?

When two atoms with electrons having the same spin approach each other for bonding,which of the following will occur?