Covalent bonds are formed when atoms share electrons and ionic bonds are formed when positive and negative ions bond to form an ionic compound. true or false?

True

Explanation:

Nonmetals have high and similar electronegativities (EN), so they share pairs of electrons to have 8 electrons in their valence shell. This is known as a covalent bond.

Metals have low EN and nonmetals have high EN. As a consequence, metals tend to lose electrons, forming cations (positive ions), and nonmetals tend to gain electrons to form anions (negative ions). They also obey the octet rule. Cations and anions are attracted through electrostatic forces which constitute the ionic bond, giving rise to an ionic compound.

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