Arrange the following atoms and ions in order from smallest to largest radius K+, Ca2+, S2-, Cl-, Ar+

What is the most stable monatomic ion formed from nitrogen

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

A0.100-kilogram apple hangs in a tree 1.50 meter above the ground. ignore frictional effects, the total mechanical energy of the apples is