In three to five sentences, identify the type of bonding that would form between potassium (K) and chlorine (Cl). Use electronegativity to justify this bond type. Provide the chemical formula for the resulting compound. (two sentences is good enough tbh)

when potassium reacts with chlorine, the former loses its valence electron and the latter takes it. The two resulting ions, i.e. the potassium cation and the chloride anion, are then bonded together by the electrostatic force of attraction → an ionic bond is formed.

Explanation:

b is the correct answer

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the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)