How many periods does the periodic table have?

7

18

9

8

Does all matter have chemical energy?

Similarities between solids and gases

Caffeine molecules are large. Do you think caffeine molecules can easily pass into a cell? Why or why not?

What term defines a mass which is exactly equal to 1/12 the mass of one carbon-12 atom

What volume of gold would be equal in mass to a piece of copper with a volume of 101 ml? the density of gold is 19.3 g/ml; the density of copper is 8.96 g/ml?

According to the second law of thermodynamics, the entropy of any system always increases. According to the second law of thermodynamics, the entropy of any system always increases. True False

If the density of Cu is 8.96g/cm cubed, what is the volume of 28kg of Cu?

A piece of iron can change in different ways. How is iron bending different from iron rusting?

Which organism would least likely be selectively bred A) Dandelions B) Nantes Carrots C) Belgian Blue Cattle D) Hypoallergenic Cats

You are given a clear solution of KNO3. Using 3-4 sentences explain how you would determine if the solution is unsaturated, saturated, or supersaturated