Answer:
a. H and P
Step-by-step explanation:
A covalent bond is formed between 2 nonmetals, which share pairs of electrons to complete the octet in their valence shells. The polarity of the bond depends on the difference in electronegativity between both atoms. If ΔEN = 0, the bond is nonpolar. If ΔEN > 0, the bond is polar.
Which of the following set of atoms has a nonpolar covalent bond?
a. H and P . YES. H and P are nonmetals and ΔEN = |EN(H)-EN(P)|=|2.1-2.1|=0.
b. N and C . NO. ΔEN = |EN(N)-EN(C)|=|3.0-2.5|=0.5.
c. Li and O. NO. Li is a metal and O is a nonmetal.
d. Cl and Ca. Ca is a metal and Cl is a nonmetal.