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	18		19											20		21
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Across 2. Positively charged ion 5. Group one will always have this oxidation number 8. Type of element which appears first in an ionic compound 10. Which element in an ionic compound will have the negative oxidation number? 11. Type of bonding where electrical attraction holds compound together 12. Prefix which means "six" for covalent compounds 13. Type of element which appears last in an ionic compound 17. Molecule with only two atoms involved 18. Indicator in compound name for a transition metal's oxidation number 22. Type of bonding where sharing electrons keeps compound together 23. Compound unit for a covalent compound 24. Number used with an ion to tell its charge 25. Charge on a cation 27. Physical property explained by metallic bonding which includes movement of electricity and heat

Down 1. ________________ electrons, number of electrons in outermost shell 3. Prefix which means "five" for covalent compounds 4. Metals always give up electrons so they will have a ____________ oxidation number 6. Metals bonded with other elements using metallic bonding 7. Negatively charged ion 9. Particle which allows atoms to bonded together 10. Charge on an anion 14. Physical property explained by metallic bonding which includes hammering without shattering 15. Group sixteen will always have this oxidation number 16. Group of atoms covalently bonded that act as one particle, for example, sulfate 19. Type of bonding which holds metals together 20. How we determine how many of each element are in a covalent compound 21. Prefix which means "four" for covalent compounds 26. "Opposites attract" explains the bonding for this type of compound