THE CHEMISTRY OF LIFE

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Across
  1. 2. anything made of atoms and molecules
  2. 3. a particle with a positive electric charge
  3. 6. bond substance formed by the chemical combination of two or more elements
  4. 8. bond formed when atoms share pairs of electrons
  5. 9. table chart that shows an elements symbol , mass , and number
  6. 11. neutral groups of two or more atoms
  7. 12. atom that has a positive or negative charge
  8. 13. a particle with a neutral electric charge so basically 0 electric charge
Down
  1. 1. the type of electron that is on the outermost shell of the atom
  2. 4. particle with a negative electric charge
  3. 5. basic unit of matter
  4. 6. formed through a combination of two opposite charged ions
  5. 7. the center of an atom which contains the protons and neutrons
  6. 10. mendeleev founder of periodic table
  7. 12. atoms of an element that has a # of neutrons different from that of other atoms