Across
- 3. a substance made out of at least two different elements
- 4. an ion with a positive charge
- 7. the total amount of protons and neutrons in an atom
- 9. common name for sodium chloride
- 12. a molecule with two atoms only
- 14. the type of bond made between non-metals
- 16. most elements are most stable when they have _________ electrons in their outer shell
- 17. name of fluorine ion
- 19. atoms with the same number of protons but different numbers of neutrons
Down
- 1. a ion with a negative charge
- 2. all of the elements that can form molecular elements which are diatomic
- 5. number of neutrons in Calcium-46
- 6. covalent bonds _________ electrons
- 8. type of diagram that shows protons, neutrons and electrons
- 10. a solid mixture of metals
- 11. number of bonds in a molecule of N2
- 13. element with atomic weight of 47.87
- 14. dioxide name of chemical CO2
- 15. number of valence electrons of iodine
- 18. ion name of lithium cation