How many valence electrons does silicone have?

Select the atomic models that belong to the same element

Why is the structure of molecule important to its function?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)