What happens when an atom has more electrons than can fit in one energy
level?
A. The extra electrons start to fill higher sublevels in the energy level.

B. The extra electrons begin to fill the next energy level.

C. The extra electrons are lost, forming ions.

D. The extra electrons pair up in the orbitals within the sublevel.

If any atom has more electrons than one energy level can hold, then automatically the electron is accommodated in the next energy level (shell). The remaining extra electrons starts to fill the next energy level. This produces the valency of that particular atom.

Explanation:

answer: c.

explanation:

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.