periodic table
Across
- 2. Who created the first periodic table
- 3. this element is in the alkali metals group
- 4. this element is in the noble gases group
- 5. nonmetals become ______ ions; called anions
- 7. most reactive nonmetals
- 10. react violently with most nonmetals
- 15. when metals and nonmetals chemically bong together, ions are formed from a ______ of electrons
- 16. metals become ______ ions; called cations
- 17. nonmetals are very _____
- 18. the graph the elements are organized on
- 22. better conductor than nonmetals but not as good as metals
- 23. this element is in the halogens group
- 24. nonmetals _____ electrons
Down
- 1. type of metals that oxidize in air
- 6. alkali metals react with _____ to make strong bases
- 8. also known as "rare earth metals"
- 9. this element is in the halogens group
- 11. have characteristic colors when excited
- 12. metals are good ______ of heat and electricity
- 13. this element is in the alkaline earth metals group
- 14. the periodic table is organized into ____ and periods
- 15. type of metals that are the best conductors of heat and electricity
- 19. metals _____ electrons
- 20. extremely soft metals
- 21. the number of the charge depends on how many _____ electrons are lost or recieved