Across
- 3. rows of the periodic table
- 4. the smallest part of the element that contains all the element's properties
- 6. is a pure substance that is made from more than two or more substances
- 8. the outermost shell of the electron
- 9. something that can not be broken down any further
- 10. positively charged particles in the atom
Down
- 1. lithium, sodium, potassium
- 2. neutral particles in the nucleolus of the atom
- 5. group of atoms that has lost or gained electrons
- 7. pure