What is the electron configuration for an atom on Period #3 and in Group #17? 1s22s22p63523p64523d
1s22s22p?
1s22s22p 3s23p
1s22s22p
p64523d5

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.

answer; 4 electrons;