Which transition by an electron will release the greatest amount of energy?

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

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)

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy