Across
- 4. substance formed as a result of a chemical reaction
- 5. Horizontal row on the periodic table where all elements have the same number of energy levels
- 8. subatomic particle with a negative electrical charge
- 9. whether or not a substance will undergo a chemical change
- 10. the smalles part of a chemical element
- 11. subatomic particle with a neutral electrical charge located in the nucleus
Down
- 1. shows how many atoms of an element are present in a molecule
- 2. column of elements on the periodic table with similar properties Family
- 3. number in front of a symbol that represents the number of molecules present
- 6. subatomic particle with a positive electrical charge located in the nucleus
- 7. substance that cannot be broken down or changed