Question

which quantity determines how two atoms bond? (1 point)
the sum of their electronegativities
their total number of valence electrons
the difference in their electronegativities
the difference in the number of valence electrons

Explanation:

Electronegativity difference determines bond type. If difference is small (≤ 0.4), non - polar covalent bond. If between 0.4 - 1.7, polar covalent bond. If ≥ 1.7, ionic bond. Valence electrons affect bonding capacity but not bond type like electronegativity difference does. Sum of electronegativities or valence electron number difference don't determine bond type as per chemical bonding theories.

Answer:

the difference in their electronegativities