Unit 8: CHEMICAL NAMES AND FORMULAS

Name ______Date ______Mod ______Exam ______Across 28. These have various oxidation numbers 1. These have a 1+ oxidation number 29. The name for the compound of calcium and oxygen 3. Every compound always contains the same elements in the same proportions. Down 6. The type of compound containing only two elements 2. The number that tells how many atoms of an element are in a 7. Compounds form so that atoms can satisfy what rule? unit of the compound 8. ammonium chloride 4. A compound containing more than 2 different elements 10. The formula for chromium (III) and oxygen 5. A covalent bond wherein the electrons are shared equally 18. Name P4O10 among elements 19. silver 6. The name for a compound of barium and hydroxide 20. A covalent bond wherein the electrons are not shared equally 9. These have a 1- oxidation number 21. The formula for beryllium and iodine 11. Nickel (I) carbonate 22. NH4OH 12. Name As2O5 23. A chemical combination of two or more elements having 13. The group which does not have oxidation numbers. different properties than the individual elements 14. Nona is the prefix for ___ in a covalent bond 24. Name Na2S 15. The prefix for 7 in a covalent bond 25. A single atom with a charge 16. The formula for calcium and oxygen 26. The prefix for 4 in a covalent bond 17. The ion ClO3- 27. The positive/negative number assigned to an element that shows its ability to combine in a compound

Also for the exam:  Be able to draw electron dot diagrams for various ionic bonds (brackets) and covalent bonds (dots).  Be able to write a (ionic and covalent) for a given set of elements/polyatomic ions.  Be able to write the compound name for a given formula (ionic and covalent).  Know the properties of ionic, polar covalent, and nonpolar covalent compounds.

Complete the following on loose-leaf:  Draw e- dot diagrams for Na2O, Iron (II) & , N2, Diatomic iodine, Calcium & , dihydrogen monoxide, HF, and magnesium phosphide  Write the formula and the names for: sodium and phosphate ion; zinc and ion; iron(III) and carbonate ion; aluminum and oxygen, barium and nitrate ion, cesium and , lithium and nitrogen.  Name the following covalent compounds: P4S10, SiBr4, S2Cl2, XeF6, CO, ClO2, and C3N4  Write the formula for the following covalent compounds: disulfur decafluoride, , , nitrogen tribromide, diphosphorus trioxide, and iodine hetpafluoride