Unit+4+-+Periodic+Trends

\1) Which of the following elements are the least reactive? a. Alkali metals

**b. Noble gases**
c. Halogens d. Alkaline earth metals e. Metalloids

2) Which of the following is a non-metal? a. Lithium **b. Bromine** c. Mercury d. Bismuth e. Sodium

3) Which of the following is a metal? a. Nitrogen b. Phosphorus c. Arsenic **d. Thallium** e. Silicon

4) Which of the following is a metalloid? a. Carbon b. Sulfur **c. Germanium** d. Iridium e. Bromine

5) A row on the periodic table is called a ___. a. Group **b. Period** c. Isotopic mixture d. family e. Sub-shell

6) Which of the following ions occurs commonly?
 * a. N-3** b. S-6 **c. O-2** d. Ca-1 e. Cl –2

7) Which of the following ions occurs commonly? a. P+3 b. Br+7 c. O+6 **d. Ca +2** e. K +3

8) Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide? a. NaO b. NaO2 **c. Na2O** d. 2 Na2O e. Na2O2

9) Barium Fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula for barium fluoride?
 * a. BaF2** b. Ba2F2 c. BaF d. Ba2F e. BaF4

10) The colorless substance, MgF2 is used in the ceramics and glass industry. What is its name? a. Magnesium difluoride **b. magnesium fluoride** c. magnesium (II) fluoride d. monomagnesium difluoride e. monomagnesium difluoride

11) The substance CoCl2 is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name? a. Cobalt dichloride **b. cobalt (II) chloride** c. cobalt chloride d. cobaltic chloride e. copper II chloride

12) Which one of the following combinations of names and formulas of ions is incorrect? d. PO4-3 phosphate e. CrO4-2 chromate
 * a. O2-1, oxide** b. Al+3, aluminum c. NO3-1 nitrate

13) A red glaze on porcelain can be produced by using MnSO4. What is its name? a. Manganese disulfate **b. manganese (II) sulfate** c. manganese (IV) sulfate d. manganese sulfate e. manganese (I) sulfate

14) The compound (NH4)2S can be used in analysis for trace amounts of metals present in a sample. What is its name? d. ammonia (I) sulfite e. ammonium (I) sulfide
 * a. Ammonium sulfide** b. diammonium sulfide c. ammonium sulfite

15) The substance, KClO3 is a strong oxidizer used in explosives, fireworks, and matches? What is its name? a. Potassium chlorite b. potassium chloride c. potassium (I) chlorite d. Potassium (I) chlorate **e. potassium chlorate**

16) Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain. What is its formula? a. ZnAc2 b. ZnCH3C **c. Zn(C2H3O2)2** d. Zn2C2H3O2 e. Zn(C2H6O)2

17) Which of the following elements has the smallest atomic mass?
 * a. Na** b. Ar c. K d. Ca e. Kr

18) Which of the following elements has the smallest atomic radius? a. Li **b. Ne** c. Rb d. Sr e. Xe

19) Which of the following elements has the greatest atomic radius? a. Li b. Ne **c. Rb** d. Sr e. Xe

20) Which of the following elements has the largest ionization energy? a. Na **b. Cl** c. Ca d. Te e. Br