Chemistry

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Across
  1. 2. The basic building block of all matter
  2. 3. The center of the atom
  3. 5. These small particles make up neutrons and protons
  4. 6. These have the same types of atoms
  5. 9. These particles are positive
  6. 12. Atom that is in organic molecules
Down
  1. 1. Covalent ___ share electrons
  2. 4. These type of bonds share electrons between atoms
  3. 7. When two or more atoms join together
  4. 8. Electrons without any charge
  5. 10. Most common atom in the human body
  6. 11. These type of bonds donate electrons between atoms