Rearrange the elements in the order of increasing first ionization energy. Place the element symbol with the lowest first ionization energy at the top, and the element with the highest first ionization energy at the bottom. I Br F CI

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)