Across
- 1. letters defining an element
- 3. billions of these make up our bodies
- 5. valence electrons determine this
- 9. positive charge
- 10. group of one type of atom
- 12. number of neutrons
- 14. outermost ring of atoms
- 15. horizontal grouping
- 16. periodic table of elements
- 19. vertical grouping
- 20. neutral charge
- 21. does not give off heat
- 24. does not bond with other elements
- 25. elements received from a chemical reaction
Down
- 2. matter cannot be created or destroyed
- 4. brittle, not malleable
- 6. elements put in to a chemical reaction
- 7. mixture of one or more substance
- 8. gives off heat
- 11. metallic/shiny, solid (with the exception of mercury)
- 13. group of atoms creating an element
- 17. may not be a solid, not shiny
- 18. contains neutrons
- 22. negative charge
- 23. where electrons are found