"atom, element and compound ": HTML5 Crossword

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1. valence electron of oxygen ion (5)
5. location of proton in an atom (7)
6. magnesium need to _____ 2 electrons to achieve stable electron arrangement (6)
7. diamond has _____ structure (11)
8. first person to discover atomic structure (10)
11. _____ is a covalent compound that could turns limewater cloudy (13)
14. graphite has delocalised _____ so that can conduct electricity (8,0)
15. all non-metals cannot conduct electricity except _____ (6)

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2. iodine-131 is used in _____ treatment (7)
3. Nucleon number is sum of number of proton and _____ (7)
4. ionic bond has strong _____ forces hence has high MP and BP (13)
9. transfer of electron (5,4)
10. _____ is used for cutting and drilling hard materials (7)
12. all metals are solid in room temperature except _____ (7)
13. one type of alloy (6)