Across
- 3. part of an atom that as a positive electrical charge
- 7. table chart that organises information about all of the known elements according to their properties
- 8. substance that cannot be broken down into a simpler substance
- 9. smallest unit of an element
- 10. part of an atom that has a neutral electrical charge
Down
- 1. anything that has mass and volume
- 2. vertical column on the periodic table
- 3. horizontal row in the periodic table
- 4. the center of an atom, which contains the protons and neutrons
- 5. part of an atom that has a negative electrical charge
- 6. symbol the letter(s) that represent(s) the name of an element