Which of the following properties can be used as evidence a chemical reaction has occurred? (Select all that apply) a. Density change
b. Melting point change
c. odor change
d. Color change

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Explanation for basic character?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.