An electron has a charge of

positive two

negative two

negative one

positive one

If an object has a density of 1.35 g/ml, will it float or sink in water?

An element in group 7 on the periodic table most likely has which physical property?

Describe how the amount of air changes as you travel up through Earth's atmosphere

Describe the basic characteristics of each group of elements on the periodic table

Describe a way to separate iron filings from sand.

Cobalt fluoride crystallizes in a closest packed array of fluoride ions, with the cobalt ions filling one-half of the octahedral holes. What is the formula of this compound?

When you get into a parked car in the summer time, the metal clip is hot and the seat belt fabric is not. What has a higher specific heat, the metal clip or the seat belt fabric? Think about the definition of specific heat.

A laboratory procedure calls for making 600.0mL of a 1.1M KNO3 solution. How much KNO3 in grams is needed?

How do you make good grades?

What will happen to the pressure inside a rigid container of gas if some of the gas is allowed to escape? (Assuming no change in temperature)