Which of the following expresses the value 300,000,000 in correct scientific notation? Group of answer choices

3 x 108

0.3 x 10-9

3 x 10-8

0.3 x 109

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Summarize possible ways in which phases of matter could combine to form a solution.