Across
- 3. Bi
- 6. Sn
- 8. A type of change that changes the makeup of the substance
- 9. Zn
- 10. A charged atom
- 12. (CN)-1
- 13. negatively charged elements;non-metals
- 15. Pb
- 16. The elements along the stairs excluding aluminium
- 18. an alloy of copper and zinc
- 19. heat is absorbed
- 20. A type of table that organizes elements
Down
- 1. (MnO₄)-1
- 2. atoms of the same element that have a different number of neutrons
- 4. Very reactive non-metal group with a -1 charge
- 5. pure substance made up of two or more elements
- 7. Ag
- 11. 3D sphereic structure in an atom
- 12. positively charged metal
- 14. The metals in the first column of the periodic table
- 17. Mass per unit volume