Across
- 1. graphic arranging all elements in a logical order
- 3. rows in the periodic table
- 6. equal to the number of protons
- 8. columns in the period table
- 10. substance containing multiple compounds
- 13. number written below each elemental symbol on the periodic table
- 14. different type of atoms
- 16. equal to the total number of protons and neutrons
Down
- 2. the fundamental unit of all matter
- 4. energy level that negatively charged particles orbit in
- 5. a variant of an element with a different atomic mass
- 7. uncharged particle residing in the nucleus of an atom
- 9. positively charged subatomic particle
- 11. cluster of subatomic particles in the centre of an atom
- 12. orbits the nucleus in particular energy levels
- 15. substance containing multiple elements