Matter & Atomic Structure

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Across
  1. 3. Dense center of the atom containing protons and neutrons
  2. 5. Atom or group of atoms with a positive or negative charge
  3. 7. Vertical column in the periodic table
  4. 8. Bond formed by sharing of electrons
  5. 11. State of matter with definite shape and volume
  6. 12. Pure substance made of only one type of atom
  7. 15. Number of protons in the nucleus of an atom
  8. 17. Negatively charged particle found outside the nucleus
  9. 19. Neutral particle found in the nucleus
  10. 21. Substance made of two or more elements chemically combined
  11. 23. Positively charged ion
  12. 24. Positively charged particle found in the nucleus
Down
  1. 1. High-energy state of matter where atoms lose electrons
  2. 2. Regions around the nucleus where electrons are likely to be found
  3. 4. Two or more atoms bonded together
  4. 6. Electrons in the outermost shell of an atom
  5. 9. Physical blend of two or more substances
  6. 10. Atoms of the same element with different numbers of neutrons
  7. 13. State of matter with neither definite shape nor volume
  8. 14. Negatively charged ion
  9. 16. Sum of protons and neutrons in an atom
  10. 18. Bond formed by transfer of electrons
  11. 20. State of matter with definite volume but no definite shape
  12. 22. Horizontal row in the periodic table