There are no transition elements between the Group 2 element magnesium and the Group 3 element aluminium.
Give a reason why, in terms of electronic structure.

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.

it takes on an electronical energy