The wavelength of a wave can be found by measuring how high the wave is measuring how many waves pass a point in a second measuring the distance from the crest of one wave to the crest of the next wave measuring the distance from the crest of one wave to the trough of the next wave

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.