Periodic Table
Across
- 4. metals that are ductile and malleable
- 7. alkali metal with an atomic number of 11
- 8. group 17 nonmetals
- 9. a metalloid in group 3a
- 15. electrons in the highest energy level
- 18. a russian chemist
- 19. transition metal with 27 electrons
- 20. Good conductors of heat and electricity
- 21. most reactive metals
- 22. Lanthanide with 65 protons
- 23. the horizontal rows of the periodic table
Down
- 1. all these are radioactive
- 2. metal that oxidizes in air
- 3. a nonmetal with an average atomic mass of 4.0026
- 5. Are brittle and break easily
- 6. halogen metal in row 17
- 10. a metal with 28 protons
- 11. have full valence electrons shells
- 12. alkaline earth metal with an average atomic mass of 40.074
- 13. noble gas with a symbol of Ne
- 14. A.K.A."rare earth metals"
- 16. developed a periodic table by increasing atomic mass
- 17. Shape can be easy or hard to change