Each line in the spectra represents the energy 1.) absorbed as an atom loses an electron
2.) released as an electron moves from a lower energy state to a higher energy state
3.) released as an electron moves from a higher energy state to a lower energy state
4.) absorbed as an atom gains an electron

hloride, what is the mass of calcium in

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.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.