periodic table

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Across
  1. 3. 7 different levels on the periodic table
  2. 5. they are reactive and form oxcide
  3. 7. a molecule, atom, electron, or nucleus
  4. 8. gases totally unreactive
  5. 10. an element that has properties that are intermediate between those of metals and nonmetals
  6. 11. there are 7 groups alkali metals, alkaline earth metals, boron group, carbon group, nitrogen group, oxygen group, halogens, and noble gases
Down
  1. 1. an element that readily forms positive ions and has metallic bonds
  2. 2. metals an element that is generally a poor conductor of heat and electricity
  3. 4. the outer shell of an atom that is responsible for the chemical properties of the atom
  4. 6. They are reactive nonmetallic elements that form strongly acidic compounds
  5. 9. so reactive that they are generally found in nature combined with other elements