Define Isotopes with an example.

One or more number of species which have same number of atomic number but different mass number are called isotopes.

For example, are the isotopes of hydrogen.

So here, the atomic number of each of these isotopes is 1 and have different mass number, that is, 1, 2, 3.

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.

your answer would be “dry”