The periodic table of elements is organized by the number of what?

The complicated molecules that make up living things usually contain carbon. Why is carbon so important in these molecules?

How is the electron cloud model different from Bohr's atomic model?

How do surfactants work in stain removers? a. They dissolve the stain by allowing water to wet fabrics better, and they can surround molecules in a stain and carry them into solution c. They simply whiten the stain b. They oxidize the stain d.

Compare and contrast the biological effects of high and low exposure to radiation. List ways in which low and high exposure differ.

A scientific law is the explanation of multiple scientific theories. True False

If you can walk 2.1 miles in 35 minutes, how many days will take you to con the United States (3350 mi) if you walk 8 hours a day

How many electrons are in 1.01 oz of a pure gold coin?

When glass is spun into fine fibers, the trapped air makes a thermal insulator. A. TRUE B. FALSE

Which has a greater mass: 12 mol of salt (NaCl) or 7 mol of silver (Ag) ?

How does particle movement differ in a solid, a liquid, and a gas