Across
- 1. The least reactive alkali metal
- 5. An alkaline earth metal that has the greatest nonmetallic character.
- 8. A noble gas with an atomic radius of 32 pm
- 9. An element that is a crystalline halogen.
- 13. Attraction for electrons
- 14. A gas at STP that can have an excited electron configuration of 2 - 4 - 1
- 16. A non-transitional metal that has the same valence electrons as oxygen.
- 17. Metals that make colored solutions.
- 19. The elements get smaller as you move across the periodic table because the ________ charge increases.
- 21. bigger than magnesium but smaller than strontium.
- 22. The most reactive nonmetal in period 3.
Down
- 2. Scientist that was given credit for devising the periodic table
- 3. The energy needed to remove an electron
- 4. The element with both nonmetallic and metallic properties in group 15.
- 6. An un-reactive (inert) monoatomic gas that has 28 core (kernel) electrons
- 7. The name of the element with the chemical symbol V.
- 10. A diatomic element that is chemically similar to sulfur.
- 11. The most reactive metal in period 4.
- 12. The most reactive halogen
- 15. A family of metals that are never found in nature uncombined.
- 18. A metalloid with a electronegativity of 1.9
- 20. elements are arranged according to ________ number.