What is digital vs analog? what is an example of each?

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 many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg