No, CaS (calcium sulfide) is not a covalent bond. It is an ionic bond, formed between calcium (a metal) and sulfur (a nonmetal) resulting in the transfer of electrons from calcium to sulfur.
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The type of bond in which two atoms share electrons is called a covalent bond.
No, calcium and sulfur do not typically form a covalent bond because calcium typically forms ionic bonds by donating its two valence electrons to sulfur, which is a nonmetal. Calcium and sulfur would form an ionic bond in a compound like calcium sulfide (CaS).
Nitrogen is a non-metal and when non-metals bond with each other, they from covalent bonds. Covalent bonds are bonds where electrons are shared. not only is Nitrogen a covalent bond, but it forms a triple bond due to the valence electrons attraction.
When atoms share electrons, they form a chemical bond, or covalent bond.
Another name for a dative covalent bond is 'coordinate covalent bond'.