True or false there are equal numbers of protons and electrons in neutral atoms.

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B How many grams of A would be needed to give the same number of particles: as 7.5 grams of B? as 2.5 grams? as 12.5 grams? as 1 gram?

150 words describing Bohr's model, and the fundamental principles behind it. Also, explain how Bohr's model is different from Rutherford's model.

How many atoms of iron are there in 2.01 moles of wolframite FeWO4

Which change in temperature will reduce the volume of a gas at constant pressure by one-half?

Hydrogen gas and nitrogen gas react to form ammonia gas. What volume of ammonia would be produced by this reaction if 6.

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)

Which term names the group of organisms able to interbreed and produce fertile offspring?