Periodic Table
Across
- 1. an atom that has gained or lost one or more electrons
- 3. the smallest the unit of an element
- 7. a vertical column (up and down)
- 10. a substance that cannot be broken down into a simpler substance
- 11. the element for He
- 14. the element for Na
- 15. positive charge
- 16. has properties of a metal and some properties of a nonmetal
- 18. the element for C
- 19. neutral charge
Down
- 2. the element for N
- 4. anything that has mass and volume
- 5. negative charge
- 6. the smallest unit of a compound
- 8. how likely an element is to form bonds with other elements
- 9. horizontal row (left to right)
- 12. an element or substance that conducts heat and electricity
- 13. an element that doe not conduct electricity or heat
- 17. the element for K
- 20. the element for O