Match each term with the appropriate definition. spectroscopy
the study of the absorption and emission of
light by atoms
absorption spectrum
represents energy absorbed as dark bands
atomic spectrum
represents energy emitted or absorbed
during electron jumps
emission spectrum
represents energy emitted as colored lines

Ais stronge

The water cycle increase the water content in the earth atmosphere

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.