chemistry bonus

1. what rule states that electrons must occupy all of the orbitals of a sublevel before pairing begins?
3. visually seperate solids can be separated by?
7. Who discovered electrons while experimenting with a cathode ray tube?
9. polar molecules can be dissolved in...
11. what is a combination of 2 or more pure substances in which each substance retains its own chemical properties?
13. the number of protons in the nucleus
17. who created the first periodic table?
18. a single compound breaks down into two or more elements or new compounds is...
20. what is the ratio of the error to the actual value multiplied by 100?

2. what is located on the right of the metalloid line?
4. what is located on the left of the metalloid line?
5. what is the smallest ratio of cations to anions referred to as?
6. a description of an element's tendency to undergo chemical reactions is called?
8. what is the mass of an atom given in amu?
10. Who discovered the nucleus of an atom?
12. the transfer of electrons between atoms that results in cations and anions...
14. atoms will gain, lose, or share valence electrons to attain 8 valence electrons is what rule?
15. what is called when oxygen combines with a substance and releases heat and light?
16. What is the lowest energy of an atom called?
19. horizontal rows on the periodic table are called...\