The diagram above shows the atomic emission line spectrum of hydrogen. the wavelength of each line is shown at the top of the line. what does each line of the spectrum represent?

a) the color of the atom

b) the energy of a photon

c) the distance between orbits

d) the number of electrons

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.