Unit 2 chem

1. These make up 80% of the periodic table
4. The number of wave cycles that pass a given point per unit of time
6. Vertical column on periodic table
10. The way electrons are arranged in various orbitals around the nucleus of an atom
12. The smallest particle of an element
15. A wave's height from zero to crest
17. The total number of protons and neutrons in the nucleus of an atom
18. What represents the fixed energies of an electron
19. Horizontal row on the periodic table
20. Atoms that have the same number of protons but a different number of neutrons

2. The mnemonic for atomic number and mass number
3. The attractive force that holds the nucleus together
5. These are ions that loose electrons
7. These have properties of both metals and nonmetals
8. Electrically neutral means an overall charge of what?
9. True or false, Atomic mass and mass number are the same thing
11. What regions of the atom contains Protons and Neutrons
13. distance between crests
14. This scientist propsed and created the Bowling ball model
16. This prinicple explains that every orbital in a sublevel is doubly occupied