Across
- 4. formula contains coefficicent and subscript
- 7. mass # - atomic # = # of neutrons
- 9. shiny,ductile,good conductors
- 12. semi-conductors
- 13. verticial columns
- 16. negatively charged
- 18. a substance produced during a natural, chemical, or manufacturing process
Down
- 1. table a table that organizes the known elements by order of increasing atomic #
- 2. atomic # = # of protons= # of electrons
- 3. dull,brittle,poor conductor
- 4. the big #;multiply all subscripts by the coefficient
- 5. mass round to mass #
- 6. a substance that takes part in and undergoes change during a reaction
- 8. little #;indicates the number of atoms of an element
- 10. postively charged
- 11. electrons only the electrons in the outer most shell
- 14. numbers arranged in groups known as energy levels
- 15. the smallest units of an element
- 17. neutral charge