Where on the periodic table do you find elements that have full valence electron shells? O across the top of the periodic table
across the bottom of the periodic table
on the left side of the periodic table
O on the right side of the periodic table

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)