Biology Terms

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Across
  1. 2. composed of two or more elements
  2. 5. different number of neutrons, but chemically react the same
  3. 8. substance that cannot be broken down
  4. 10. center of an atom
  5. 11. atom that has a charge
Down
  1. 1. two ions transfer one or more electrons
  2. 2. atoms stuck together; sharing electron(s)
  3. 3. happens when electrostatic attraction in proton and electromagnetic attraction in atom
  4. 4. a groupd of atoms bonded together
  5. 6. negative charge orbits the nucleus
  6. 7. particle sticking together of the same substance
  7. 9. particles sticking together of different substances