Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[EX Q]: Question: Electrons in the "outer shell" are also known as what kind of electrons? Answer: valence
[EX A]: Determine the total number of valence (outer shell) electrons. For cations, subtract one electron for each.

[EX Q]: Question: What type of competition occurs between members of the same species? Answer: intraspecific
[EX A]: Intraspecific competition occurs between members of the same species. For example, two male deer may compete for mates by clashing their antlers together.

[EX Q]: Question: The wave on a guitar string is transverse. the sound wave rattles a sheet of paper in a direction that shows the sound wave is what? Answer: longitudinal
[EX A]:
Figure 16.33 The wave on a guitar string is transverse. The sound wave rattles a sheet of paper in a direction that shows the sound wave is longitudinal.