Periodic Table

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Across
  1. 2. an atom with a charge (positive or negative)
  2. 4. The vertical columns on the periodic table.
  3. 5. Has a nucleus with subatomic particles, protons and neutrons, and electrons are on a ring on the outside.
  4. 7. Is a horizontal row on the periodic table.
  5. 10. 7 electrons in their valence shell, they react rapidly with metals to form salts
  6. 11. a small electrically charged particle
  7. 13. The negative charge that surrounds the nucleus.
  8. 15. They are protons, electrons, and neutrons.
  9. 17. Chemical elements that mostly lack distinctive metallic properties
  10. 18. The middle of an atom.
  11. 19. The positive charge in the nucleus of an atom.
Down
  1. 1. Is a vertical column on the periodic table
  2. 3. A chemical element that exhibits some metal and some nonmetal properties
  3. 5. The number of combined protons in an atom.
  4. 6. Any substance capable of conducting electricity at a temperature of absolute zero
  5. 8. Two or more forms of the same element that contain the same protons and different neutrons.
  6. 9. If OH- ions has greater quantity than H+ ions
  7. 12. Any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table
  8. 14. The amount of protons and neutrons in the atom.
  9. 16. The neutral charge in the nucleus of an atom.