1. who is the father of atomic theory?
2. who discovered the electron?
3. who expressed particles by wave equations?
4. who researched on radioactivity?
5. who discovered the "open spaces" model?
6. who applied quantum theory to atoms?
-rutherford, -bohr, -thomson, -curie, -dalton, -schrö

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

Answer explain why it is not possible to deduce a complete order of reactivity.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided