Across
- 2. made of atoms, simplest substances
- 3. neutral charge
- 4. thin layer of gold, silver, or other metals around an object
- 6. a substance that takes part in change during a reaction
- 7. the principle that matter can't be created or destroyed
- 12. absorbs energy
- 14. Russian chemist, created periodic table
- 18. number of protons in the nucleus
- 20. located in far right group of elements
- 22. what makes up elements
- 23. circles around nucleus
- 24. conductors of electricity
Down
- 1. row (horizontal)
- 2. gives off energy
- 4. positive charge
- 5. positively charged center
- 8. short representation of an element
- 9. outermost electron(s)
- 10. recombination of atoms
- 11. weight of element
- 13. substance formed when 2 or more elements chemically bond
- 15. nonmetallic element, has some properties of a metal
- 16. an element not having the character of a metal
- 17. negative charge
- 19. smallest particle in a chemical element
- 21. column (vertical)