Across
- 2. made of only one type of atom
- 4. the number of atoms in HCl
- 8. an element with 4 energy levels and 2 valence electrons
- 10. two or more atoms chemically bonded together
- 11. elements with full outer energy levels
- 13. molecules are rearranged to make new molecules
- 14. responsible for the identity of the element
- 15. all the elements found in group 1A
- 16. contains all of the mass of the atom
- 18. subatomic particle with no charge
- 19. tells you the number of atoms of an element in a molecule
- 21. areas in the electron cloud where electrons are found
- 22. found in the outermost energy level
Down
- 1. the moleculs before a chemical reaction
- 3. tells you the number of molecules in a chemical formula
- 5. a notation that tells you what a molecule is made of
- 6. tells you the number of subgroups in a chemical formula
- 7. matter cannot be created or destroyed, only_
- 9. an element with 30 protons
- 12. all elements with the same number of valence electrons are found here
- 17. an element found on the zigzag line in the Periodic table
- 20. a horizontal row in the Periodic table