What are some examples of how matter moves through a cycle on earth

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Monkeys and bats have similar bone structure in their forelimbs. however, monkeys have longer forelimbs to use for climbing and swinging in trees. bats have shorter forelimbs to use for flight. which term best describes how monkey and bat forelimbs are related to each other? a. homologous b. embryonic c. analogous d. vestigial

Which other elements contain the same number of outer electrons as sodium