In this element - oxygen - the numbers down the right side indicate the a. mass b. toxicity c. number d. ion charge

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

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.