Which substance accounts for nearly 80 percent of earth's atmosphere?
a. oxygen
b. nitrogen
c. carbon dioxide
d. argon

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

What are four significant sources of ghgs that come from wostem washington?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space