Across
- 6. Substance in simplest form
- 8. Shiny, malleable, conductive
- 9. Dull, brittle, not conductive
- 12. Says that mass is not destroyed or gained in a reaction
- 15. Row on periodic table
- 16. Columns of Periodic table
- 21. Carries negative charge
- 22. Substance takes parts in chemical reaction
- 24. Mass of an element
- 25. Gases of Group 18, Outer shells are full
Down
- 1. Energy level of atoms
- 2. Basic unit of an element
- 3. Electron in outermost orbital
- 4. Inventor of first periodic table
- 5. Abbreviation of element
- 7. Center of an atom
- 10. Number of protons and electrons in the element
- 11. Reaction that gives of heat
- 13. Substance with at least 2 elements chemically bonded together
- 14. Carries Neutral Charge
- 17. Reaction that produces cold substance
- 18. Substance formed as a result of a chemical reaction
- 19. Groups on atoms bonded together
- 20. Carries Positive Charge
- 23. Shares properties of both metals and metalloids