Chemistry Elements Crossword

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Across
  1. 4. How is the modern periodic table organized?
  2. 6. What are highly reactive nonmetals that gain one electron to form -1 ions?
  3. 7. How are elements rarely react with other substances classified?
  4. 8. Metals have very ____ melting points
  5. 11. Nonmetals are ____ conductors of heat and electricity
  6. 15. Metalloids contain properties of _____ and ____
  7. 19. An element is classified as _____ that readily forms compounds
  8. 21. Lithium is a ______ Metal
  9. 22. Lanthanides oxidize when exposed to ____
  10. 23. Halogens charge is _____
  11. 24. Have a full valence electron shell
  12. 26. Elements have a regularity in their ______
  13. 28. All _____ are radioactive
  14. 29. What inert gases with full valence shells, making them very stabel.
  15. 30. How many bonding pairs of electrons are present in the lewis dot structure of a nitrogen molecule?
  16. 31. What metals have variable valencies and can form multiple positive ions?
Down
  1. 1. Helium is a _____
  2. 2. In groups 1-3 __ - __ have a consistent ion charge pattern
  3. 3. curlum is a _____
  4. 5. How many valence electrons does a atom of oxygen have?
  5. 9. Manganese is a _____ Metal
  6. 10. When metals and nonmetals chemically bond together, ions are formed from a _____ of electron.
  7. 12. lanthanides and actinides are block elements which means they are ____ on earth and radioactive.
  8. 13. Transition metals have good _____ of heat and electricity`]
  9. 14. Metals ____ electrons
  10. 16. What are highly reactive metals that readily lose one electron to form a +1 ion.
  11. 17. Who is credited for designing the first periodic table?
  12. 18. What reacts with water to form bases
  13. 20. Europlum is a _____
  14. 25. Alkalo metals are extremely _____
  15. 27. Nonmetals _____ electrons