Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: Metalloids such as boron have an outer energy level that is about half full. These elements need to gain or lose too many electrons for a full outer energy level to come about easily. As a result, these elements are not very reactive. They may be able to conduct electricity but not very well. Answer: half full
A:
About how full is the outer energy level in metalloids?