THIS NEEDS TO BE ANSWERED ASAP THIS IS DUE TOMORROW!!! a. Neon is considered a pure substance. What do you observe about the molecules?
b. Could the other molecules in this simulation (argon, oxygen, and water) be considered pure substances? Explain your thinking.
If you answer this correctly I will give brainliest and 100 points!!

The element that has the greatest electronegativity is

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)

One similarity and one difference between an element and a mixture of elements