Unit 5 Crossword Puzzle

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Across
  1. 2. Loses electrons.
  2. 6. A + BC → AC + B.
  3. 7. Tells you the number of atoms of an element (the small number written on the bottom right of an element).
  4. 8. AB → A + B.
  5. 10. A chemical substance composed of identical molecules consisting of atoms of two or more chemical elements.
  6. 11. A negative charge that is found in the orbital surrounding the nucleus of an atom.
  7. 12. Any hydrocarbon (O2, C, H) reacting with oxygen that releases heat, carbon dioxide, and water.
  8. 13. Gains electrons.
Down
  1. 1. Pure elements that form molecules consisting of two atoms bonded together.
  2. 3. A + B → AB.
  3. 4. AB + CD → AD + CB.
  4. 5. An atom that gains or loses an electron.
  5. 9. The number that is placed in front of a formula or chemical symbol which tells the amount of atoms that are involved in a reaction.