Definition: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: Group 14 is called the carbon group. Carbon (C) is a nonmetal. The next two elements are metalloids, and the final two are metals. All the elements in the carbon group have four valence electrons. They are not very reactive. All are solids at room temperature. Answer: valence
Output:
What type of electrons do all group 14 elements have four of?