Across
- 5. A famous periodic graph for elements
- 6. positively charged particle in the nucleus of the atom.
- 8. symbol, 1 or 2 letter abbreviation for an
- 10. the first element
- 12. There are 118 of these
- 13. Helium is this type of element
Down
- 1. A kind of matter with special properties
- 2. Made of reactants
- 3. number of protons with the nucleus in the
- 4. The table that features hydrogen and
- 7. center of the atom
- 9. Ingredients for a product (scientifically)
- 11. the term for columns on the periodic table, also known as "families"
- 14. negatively charged particle that goes around the center of an atom