AP BIOLOGY

Detailed explanation-1: -A covalent bond is formed between two non-metals. The sharing of electron pair takes place between their atoms and a covalent bond is formed. Q. An ionic bond is formed when a non-metal and a metal form a bond by transferring electrons.

Detailed explanation-2: -In general, covalent bonds form between nonmetals, ionic bonds form between metals and nonmetals, and metallic bonds form between metals.

Detailed explanation-3: -Covalent compounds are formed when two nonmetals react with each other. Since hydrogen is a nonmetal, binary compounds containing hydrogen are also usually covalent compounds.

Detailed explanation-4: -A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Detailed explanation-5: -A covalent bond is the force of attraction that holds together two atoms that share a pair of valence electrons. Covalent bonds form only between atoms of nonmetals.