Across
- 2. a group of the same atoms
- 4. a substance with multiple elements that are not chemically combined
- 6. negative charge that orbits the nucleus
- 7. first element on the periodic table
- 12. Mr McConnon's favourite element
- 13. electrons in the outer shell of an atom
Down
- 1. when 2 or more elements or molecules combine to form a new product
- 3. horizontal row from the periodic table
- 5. mass of one mole of an element/molecule
- 8. smallest unit that makes up an element
- 9. positively charged thing in the nucleus
- 10. 6.02 x 10^23, aka Avogadro's number
- 11. where protons and neutrons are found in an atom