Matter Vocabulary

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Across
  1. 1. center of an atom; contains neutrons and protons
  2. 3. particle without a charge in an atom’s nucleus
  3. 5. two or more atoms of the same element having different numbers of neutrons
  4. 7. atom that is negatively or positively charged because it has lost or gained one more electrons
  5. 9. pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
  6. 10. electrical attraction between two oppositely charged atoms or groups of atoms
  7. 11. building block of matter; contains subatomic particles- neutrons, protons, and electrons
  8. 12. pure substance with unique properties; formed when two or more different elements combine
Down
  1. 2. negatively charged particle that occupies space around an atom’s nucleus
  2. 4. compound whose atoms are held together by covalent bonds
  3. 6. type of chemical bond formed when atoms share electrons
  4. 8. positively charged particle in an atom’s nucleus