When potassium reacts with arsenic to form an ionic compound, each metal atom loses electron(s) and each nonmetal atom gains electron(s).There must be potassium atom(s) for every arsenic atom(s) in the reaction. Enter the smallest integers possible.

When potassium reacts with arsenic to form an ionic compound, each metal atom loses 1 electron(s) and each nonmetal atom gains 3 electron(s). There must be 3 potassium atom(s) for every 1 arsenic atom(s) in the reaction.

Explanation:

We need to consider the octet rule: each atom will gain or lose electrons to have 8 electrons in its valence shell.

To have an electrical molecule between K⁺ and As³⁻, we require 3 K⁺ and 1 As³⁻, and the resulting formula is K₃As.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

c. 75.7

i think that is the right