Final answer:
Lithium has 1 electron in its outer energy level, while hydrogen has 1 electron in its outer energy level as well.
Step-by-step explanation:
In terms of their outer energy level electrons, lithium and hydrogen have some similarities and differences. Lithium has 2 electrons in the first energy level and 1 electron in the second energy level. This means that lithium has 1 electron in its outer energy level. On the other hand, hydrogen has 1 electron in its outer energy level, which is also its first energy level. Both lithium and hydrogen have 1 electron in their outermost s-orbital, which gives them some similar properties.