Chemistry!

5. The group 17 elements characterized by highly negative electron gain enthalpies.
7. The rule stating that electron pairing in p, d, and f orbitals cannot occur until each orbital is singly occupied.
9. The type of formula that shows the simplest whole-number ratio of atoms in a compound.
11. Concentration term that depends only on mass and is independent of temperature.
12. The scientist associated with the Uncertainty Principle of position and momentum.

1. What happens to the metallic character of elements as you move down a group?
2. A three-dimensional space around the nucleus where the probability of finding an electron is maximum.
3. The closeness of various measurements for the same quantity to each other.
4. Concentration terms expressed as moles of solute per liter of solution.
6. The exclusion principle stating that no two electrons in an atom can have the same set of four quantum numbers.
8. What happens to the atomic radius as you move from left to right across a period?
10. the scientist whose law states that equal volumes of gases contain equal numbers of molecules.