Brainliesttt !me : )

which of the following correctly describes how metals behave in an ionic bond?

metals lose their valence electrons and form positive ions.
metals lose their valence electrons and form negative ions.
metals gain valence electrons and form positive ions.
metals gain valence electrons and form negative ions.

Which statement best describes the function of enzymes?

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)

Once similarity and one difference between a mixture of elements and a mixture of compounds