3. established the atomic theory with five major points: All matter is composed of . Atoms cannot be created or . All atoms of the are identical Chemical reactions occur when atoms are combined, separated, or . Compounds are formed by the of two or more different kinds of atoms. 4. Did John Dalton agree with Democritus that atoms are indivisible?

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

In 2002, the rare earth elements mine in mountain pass, california was closed because

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?