Unit 8:
CHEMICAL
NAMES
AND
FORMULAS
Name _________________________________________________________________ Date __________________________ Mod ____________ Exam __________________________
Across
1. These have a 1+ oxidation number
3. Every compound always contains the same elements in the
same proportions.
6. The type of compound containing only two elements
7. Compounds form so that atoms can satisfy what rule?
8. ammonium chloride
10. The formula for chromium (III) and oxygen
18. Name P4O10
19. silver oxide
20. A covalent bond wherein the electrons are not shared equally
21. The formula for beryllium and iodine
22. NH4OH
23. A chemical combination of two or more elements having
different properties than the individual elements
24. Name Na2S
25. A single atom with a charge
26. The prefix for 4 in a covalent bond
27. The positive/negative number assigned to an element that
shows its ability to combine in a compound
28. These have various oxidation numbers
29. The name for the compound of calcium and oxygen
Down
2. The number that tells how many atoms of an element are in a
unit of the compound
4. A compound containing more than 2 different elements
5. A covalent bond wherein the electrons are shared equally
among elements
6. The name for a compound of barium and hydroxide
9. These have a 1- oxidation number
11. Nickel (I) carbonate
12. Name As2O5
13. The group which does not have oxidation numbers.
14. Nona is the prefix for ___ in a covalent bond
15. The prefix for 7 in a covalent bond
16. The formula for calcium and oxygen
17. The ion ClO3-
Also for the exam:
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Be able to draw electron dot diagrams for various ionic bonds (brackets) and covalent bonds (dots).
Be able to write a chemical formula (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) & Sulfur, N2, Diatomic iodine, Calcium & Chlorine, dihydrogen monoxide, HF, and
magnesium phosphide
 Write the formula and the names for: sodium and phosphate ion; zinc and sulfate ion; iron(III) and carbonate ion;
aluminum and oxygen, barium and nitrate ion, cesium and bromine, 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, dinitrogen tetroxide, chlorine trifluoride,
nitrogen tribromide, diphosphorus trioxide, and iodine hetpafluoride