Across
- 3. structure of most of the salts at room temperature
- 5. ... is formed when two or more elements combined
- 7. an element that has properties of metals and non-metals
- 9. chemical bond that formed when elements sharing electrons
- 12. atom that has positive net charge
- 15. The Russian scientist who developed the first widely accepted periodic table
- 16. type of ion that has extra electron(s)
- 17. elements that have seven valence electrons
- 19. the only non-metal in group 1
- 20. the horizontal rows of periodic table
Down
- 1. type of molecules that usually formed from ionic bond
- 2. ... number is the amount of protons of element
- 4. ... metals is a group of elements that have single electron valence
- 6. type of bonding you will find in aluminium foil
- 8. chemical bond that requiring electron(s) transfer
- 10. the outermost electrons involved in bonding
- 11. the element that was discovered by Marie Curie for its radioactivity
- 13. a particle that has gained or lost electron(s)
- 14. group of elements that have 8 valence electrons
- 18. the vertical columns of periodic table