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