Nitrogen has an atomic mass of 14 and an atomic number of 7, so the number of neutrons must be

indium, and thallium have three electrons i think

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.