What are all the elements that form an anion Type all that apply
is it selenium, calcium, fluorine, iodine, potassium, rubidium, magnesium, sulfur, barium, and/or bromine?

first one is the correct answer

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.

the answer is d.) potassium

the answer is a for sure mark brainliest i had got this right on usatestprep