Extra credit

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Across
  1. 5. / Elements that are gases or dull, brittle solids that are poor conductors of heat and electricity.
  2. 8. / Atom or bonded group of atoms with a positive or negative charge.
  3. 10. / ________ are atoms of the same element with the same number of protons but different number of neutrons.
  4. 11. earth metal / Group 2A elements
  5. 15. / yltgtoreevcneiint
  6. 17. cloud / The area in which electrons can possibly be found.
  7. 18. / Elements that are solid at room temperature, good conductors of heat and electricity, and shinny.
  8. 19. / Highly reactive group 7A element.
Down
  1. 1. / ______ is the horizontal row of elements in the periodic table
  2. 2. gas / extremely unreactive group 8A element.
  3. 3. / _____ is the vertical column of elements in the periodic table.
  4. 4. / Form of matter that doesn't change composition.
  5. 6. / Element that has physical and chemical properties of both metals and nonmetals.
  6. 7. metal / Group 1A elements, except for hydrogen.
  7. 9. / rule states that electrons will spread out before pairing up.
  8. 12. / The highest point of a wave.
  9. 13. law / werpdiilaoc
  10. 14. / vlghwteean
  11. 16. number / The number after an element's name, representing the sum of its protons and neutrons.