if nitrogen, which has an electronegativity of 2.0, bonds with hydrogen, which has an electronegativity of 2.1, the bond between the two atoms will be classified as an covalent bond.

Nonpolar

Explanation:

Atoms with small differences in their electronegativities (< 0.4) are said to form nonpolar covalent bonds.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.