Please help I’ll give brainiest.

I would say student 2 was correct

protons determine the identity of an aromas they don't change, they are constant unlike electrons

however valence electrons are the ones to determine the chemical properties of an element as they take part in chemical reactions

the answer is definitely c.

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.