The number of blank in an atom of an element is the element's atomic number

What major factors play role in global warming

A scientist read about an experiment done by someone else. She does the same experiment in her lab to make sure it works. This is an example of

What happens when a solid is dissolved into a liquid? A) Solid particles float toward the surface layer of liquid particles. B) Solid particles sink down toward the bottom layer of liquid particles.

Given the chemical reaction Fe3O4 + H2 ⟶ Fe + H2O, identify the coefficient of H2O in the balanced equation. 1 2 6 4

Powdered drink mix dissolved in water. if you let all liquid evaporate out of the pitcher would you be able to see the solid particles of the drink mix?

Name 4 common chemical properties of matter

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).