Question

question 13 (1 point)
to form an ion with single negative charge, a nonmetal atom must:
gain a protongain an electronshare an electronlose an electron
question 14 (1 point)
which best describes a covalent bond?
complete even sharing of electronsmovement of electrons to a metalsharing of electrons between two atomshas a partially positive chargenone of the above describe a covalent bond

Explanation:

Question 13

An atom's charge is determined by the balance of protons (positive) and electrons (negative). A non - metal atom forms a single - negative ion. Protons are in the nucleus and are not gained/lost easily. Gaining an electron (negative charge) will make the atom have one more electron than protons, resulting in a single - negative charge. Sharing an electron is for covalent bonding. Losing an electron would make the atom positive.

A covalent bond is defined as the sharing of electrons between two atoms. It is not necessarily a complete even sharing (polar covalent bonds exist). Movement of electrons to a metal is more related to ionic bonding (in some cases). Having a partially positive charge is a property of a polar molecule, not the definition of a covalent bond.

Answer:

gain an electron

Question 14