Where are atoms that tend to gain electrons located in the periodic table of the elements?
a. on the left side
b. on the right side
c. in the middle columns
d. starting on the fourth row

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.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.