The empirical formula of an unknown organic compound is CH₂X, where X is a single halogen atom. A 0.500 g sample of the pure compound is found to contain 0.120 g of carbon and 0.020 g of hydrogen; the rest of the mass is due to X. Which halogen is X most likely to be?
a) Bromine
b) Fluorine
c) Chlorine
d) Iodine