Across
- 3. carries a positive charge
- 5. this cannot be broken down smaller, smallest in the universe
- 6. carries a negative charge
- 7. energy absorbed to cool down
- 8. substance being changed in a chemical reaction
- 10. substance that is naturally formed or manmade
- 11. mass of the element
- 14. anything can change into the three states of matter
- 17. most elements are this
- 19. column of elements, starts top left of table (1-18)
- 20. center of an atom
- 21. two or one letters telling the element name
- 22. unique conducting properties, in most computers
- 23. carries a neutral charge
- 24. rows of elements, starts far left of table (1-7)
- 25. set of protons/electrons (2,8,8,2)
Down
- 1. energy released in a form of heat
- 2. outer most electron
- 3. substance manufactured for sale
- 4. smallest part of any chemical property
- 9. these are on the far right of the table, not reactive to other elements ex. Helium
- 12. two or more elements combined together to make one
- 13. creator of the periodic table
- 15. number of protons/electrons
- 16. elements that are not metals
- 18. a coating of another substance