Test Key

Unit 3-7 Test  pages 172-203   Name                                KEY                  .____   Hr_____

Multiple Choice/Guess

1.__B__ Which of the following elements is most like Ca?                                                      100 pts

         A) Potassium.                              C) Hydrogen.

         B) Barium.                                  D) Chromium.

2.__A___Which of the following is NOT a Diatomic molecule?

         A) Helium.                              C) Bromine.

         B) Chlorine                             D) All three are diatomic molecules.

3.__C__      Which family of atoms would have 4 valence electrons?

         A) Halogen Family             C) Carbon Family

         B) Noble Gas Family          D) Boron Family

4.__C__      Which of the following is not a metal characteristic?

         A) Forms Hydrogen in acids. C) Nondconductive.

         B) Malleable.                      D) All three are metal characteristics.

5.__D__      Which family of atoms is also known as Chalcogen?

         A) Alkali Metal                   C) Nitrogen Family

         B) Alkaline Earth Metal     D) Oxygen Family

6.__C__      Which family of atoms has the most energy in their bonds?

         A) Alkali Metal                   C) Nitrogen Family

         B) Alkaline Earth Metal     D) Oxygen Family

7.__B__      Which prefix represents the subscript six?

         A) Octa                                       C) Hepta

         B) Hexa                                           D) Nona

8._B__ Which number represents the prefix Tetra?

         A) 2                                 C) 6

         B) 4                                     D) 8

9._D__ The group 8A elements are called______.

         A) Halogens                                 C) Transitions metals

         B) Alkali metals                              D) Noble Gases.

10__A_       Which of the following would most likely conduct electricity, produce Hydrogen in acids, exhibit ductility, have luster, and be malleable?

         A) Metals.                           C) Metalloids

         B) Nonmetals.                                 D) Semimetals.

True or False

11_F__        Boron would be classified as a nonmetal.

12_T__        The periodic table is mostly metals.

13_T__        Every Helium atom has 2 protons.

14_F__        Neon is a diatomic molecule.

15__T_        If something is ductile, it means it can be pounded into a different shape.

16__T_        Radioactive elements can give off mass and energy.

17__F_        Element 93 is a natural element.

18_T__        Some elements are named after famous scientists.

19_T__        Copper is a transition metal.

20_F__        Sodium is a very reactive Alkaline Earth Metal.

Essay/Completion

21. Name four families on the periodic table, list a unique fact about each, then list an example of each (15 pts)

*Alkali Metals = Group 1A The most reactive metals that are softer than most other metals. (ex. Francium)

*Alkaline Earth Metals = Group 2A Reactive metals that are not readily found in nature.(ex. Calcium)

*Halogens = Group 7AVery reactive in their elemental form. (ex. Cl2 = chlorine gas)

*Noble Gases =Group 8AThey are stable and do not react with other elements(ex. neon, used in lights)

*Boron Group = Group 3A(ex. Aluminum.)Have 3 valance electrons and have a +3 charge.

*Carbon Group = Group 4AHave 4 valance electrons and have a +/-4 charge.(ex. germanium and silicon)

*Nitrogen Group = Group 5AThese form bonds with a lot of energy!(ex. nitrogen, used in fertilizers)

*Oxygen Group = Chalcogens =Group 6A(ex. O2 = oxygen gas)Have 6 valance electrons and have a -2charge.

22. Calculate the % mass of each element in the following compounds.(10 pts)

•         B5C3BrCl2    242                                                                    P2H12O4                         138

•         B= 11x5=55    55/242x100=22%                       P=31x2=62  62/138 x100= 45%

•         C= 12x3=36      36/242x100=15%                     H=1x12=12  12 /138 x100= 9%

•         Br=80 x 1=80    80/242x100=33%                     O= 16 x 4=64  64/138x100=46%

•         Cl=35.5x2 =71  71/242x100=29%                     62+12+64=138 g/mol

•         55+36+80+71=242 g/mol

•         B= 22%  C= 15%  Br= 33%  Cl= 29%           P=45%  H=9%   O= 46% 

23. Name and describe four characteristics of nonmetals or nonmetals. Circle your choice! (10 pts)

Metals usually possess the following characteristics:

1. Malleable: Able to be pounded into various shapes and NOT lose strength.

2. Ductility: Able to be drawn into a wire.

3. Luster: Reflect light/ shiny appearance.

4. Conductor: Able to transmit electricity and heat very readily.

5. Reactivity: Produce hydrogen gas when mixed with acids (oxidize (rust) in the presence of CuCl2 [copper(ll)chloride].)

Nonmetals usually possess the following characteristics:

1. Brittle: Break when hit with a hammer.

2. Dull: Most do NOT reflect light nor appear shiny.

3. No ductility: Can NOT be drawn into a wire.

4. Nonconductor: Do NOT transmit heat or electricity.

5. Reactivity: Do NOT react with acid to form H2 gas or oxidize in CuCl2 [cupric chloride].

24. List four facts from the written portion of the article on page191 in the book, and list how one of these impacts you personally? (5 points)

25. Name and describe the three major divisions of the periodic table then give an example of each. (10 points)

Metals- elements to the left of the “stairs” on the periodic table

Nonmetals- elements to the right of the “stairs” on the periodic table

Metaloids(semimetals)- Elements touching the “stairs” on the periodic table

26. Write the proper name or symbol(Opposite of listed) and calculate the mass for the following: (15 points)

A) Pentanitrogen Octahydride               B) ClO3                                                C) Decaphosphorous Monoiodide        

N5H8                                               Chlorine Trioxide                         P10I1

N 5 X 14 =70  g/mol                       Cl 1 x 35.5 = 35.5 g/mol                 P  10 x 31 =310 g/mol

H 8 x 1 = 8 g/mol                            O 3 x 16 = 48 g/mol                        I 1 x 127 = 127 g/mol

TOTAL= 78 g/mol                         TOTAL= 83.5 g/mol             TOTAL= 437 g/mol

D) S2P5                                                       E) Carbon Tetraoxide

Disulfur Pentaphosphide                          CO4

S 2 x 32 = 64 g/mol                                    C = 1 x 12 = 12 g/mol

P 5 x 31 = 155 g/mol                                   O= 4 x 16 = 64 g/mol

TOTAL= 219 g/mol                                  TOTAL= 76 g/mol

27.  Write the proper name for five prefixes and list the number represented by each one.  (10 points)

Subscript                         Name                      Subscript                        Name 

1                                          Mono                       6                                          Hexa  

2                                          Di                            7                                          Hepta

3                                          Tri                            8                                          Octa

4                                          Tetra                        9                                          Nona

5                                          Penta                       10                                        Deca

28.  Why is it good to know if a substance is a metal or nonmetal before you decide to use it for a building project?  Explain the reasons based on the qualities. (5 points)