Chapter 9 Review Name ____________________________________

1. A chemistry student prepared a series of compounds containing only sulfur and fluorine. The following table shows the amount of each element in each compound.

Com-pound	Mass of sulfur (g)	Mass of fluorine (g)
A	20.18	47.85
B	14.44	8.53
C	16.79	59.68

a. Calculate the mass of fluorine per gram of sulfur in each compound. (g S/g F)

b. Divide the results in a. by each other. Do the numbers in part a. support the law of multiple proportions (ratio of ratios)?

2. Name the following compounds and tell what type of compound they are (ionic. or molecular).

a. FeBr₃

b. CBr₄

c. Na₂Cr₂O₇

3. State the number of electrons lost or gained in forming each of these ions and whether they are cations or anions

a Mg⁺² b. Ca⁺²

c. Br^-1 d. Ag⁺¹

Matching

____ 12. Law of definite proportions

____ 13. molecular formula

____ 14. cation

____ 15. ternary compound

____ 16. chemical formula

____ 17. metalloid

____ 18. Law of multiple proportions

____19. polyatomic ion

____ 20. transition metal

____ 21. binary compound

a. shows the number and kinds of atoms present in a molecule of a compound

b. tightly bound groups of atoms that behave as a unit and carry a charge

c. when two elements form more than one compound, the masses of one element that combine with the same mass of the other element are in the ratio of small, whole numbers

d. a compound composed of two different elements

e. Group B elements

f. any atom or group of atoms with a positive charge

g. a compound composed of three different elements

h. in any chemical compound, the elements are always combined in the same proportion by mass

i. elements with the properties of both metals and nonmetals

j. shows the kinds and numbers of atoms in the smallest representative unit of the substance.

22. The ionic charge of tantalum, Ta, in the compound Ta₂S₅ is __22__

23. The ionic charge of an element in Group 0 is __23__

24. The Group A elements in the periodic table are known as the __24__elements.

25. In a polyatomic ion the -ite ending indicates one less __25__ atom than the ate ending.

26. Atoms that have a positive or negative charge are called __26__

27. The name of a monatomic anion ends in __27__

28. __28__is the systematic name for water.

29. Binary molecular compounds are composed of two __29__ elements.

30. Acids are compounds that give off __30__ ions when dissolved in water.

22. ______________________________

23. ______________________________

24. ______________________________

25. ______________________________

26. ______________________________

27. ______________________________

28. ______________________________

29. ______________________________

30. ______________________________

31. Write the names for the following compounds:

a. FeS ___________________________ e. SrBr₂ __________________________

b. KCl __________________________ f. NCl₃ __________________________

c. CoSO₄__________________________ g- Ga₂O₃ __________________________

d. Na₃N__________________________ h. H₃PO₄ __________________________

e. HNO₂ __________________________ k. Na₃PO₄__________________________

f. CaS __________________________ l. N₂O₃ __________________________

32. Write formulas for the following

a. potassium sulfide __________________ f. hydrobromic acid _________

b. tin (IV) chloride ___________________ g. aluminum fluoride _________

c. dihydrogen monosulfide _____________ h. dinitrogen pentoxide _________

d. calcium oxide _____________________ i. iron (III)carbonate _________

e. iron (III) sulfide ___________________ j. copper (II) hydroxide _________

k. sodium chlorate ___________________ l. lead(II) phosphate ____________

m. magnesium hydrogen carbonate _____________