Question

which of the following have /has valenvy '-3'?
a. po4 and co3
b. po4 and fe
c. cl and oh
d. po4 and n
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Answer 1

Answer:

Ionic compounds are compounds composed of ions, charged particles that form when an atom

(or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a

negatively charged ion.) Covalent or molecular compounds form when elements share

electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral.

Metal + Nonmetal ¾® ionic compound (usually)

Metal + Polyatomic ion ¾® ionic compound (usually)

Nonmetal + Nonmetal ¾® covalent compound (usually)

Hydrogen + Nonmetal ¾® covalent compound (usually)

Explanation: