Use the following electron configuration to answer the question. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
How many valence electrons are in this atom?
O2
20
O 1
O 8

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

What is one real world example of a colligative property?

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely