Integrated Science 1



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ABACUS CODE 3.1.2

CHEMISTRY SUBUNIT 2 TEST- BONDING Form A

Integrated Science 1


You will need a Periodic Table to complete this exam.

Multiple Choice (1 point each)

  1. When describing chemical bonds, which of these words DOES NOT belong with the others?

a. covalent b. electron c. proton d. ionic e. sharing


  1. Which type of bond is formed when an atom of sodium transfers an electron to an iodine atom?

  1. polar covalent c. metallic e. none of these

  2. ionic d. nonpolar covalent




  1. When strontium reacts with oxygen to form strontium oxide, each strontium atom

  1. loses two ions c. loses two electrons e. none of the above

  2. gains two electrons d. gains two ions

4. Which one of the following is most likely to be a covalent compound?

a. Rb2S b. SrCl2 c. CaO d. NCl3
5. Which one of the following is most likely to be an ionic compound?

a. NO2 b. LiCl c. NaB d. SO




  1. Which pairs of atoms will share electrons when a bond is formed between them?

a. Ba and I b. Li and I c. K and Cl d. C and O e. none of these



  1. How many covalent bonds can a selenium atom usually form?

a. one b. two c. three d. five e. zero
8. Carbon makes a good atom for building long chains or branched structures,

such as those found in large biological molecules, because



  1. carbon is capable of forming ionic crystalline bonds

  2. carbon is a very common element

  3. carbon forms only double covalent bonds

  4. carbon can form up to four covalent bonds

  5. all of the above




  1. Which of these is a correct compound name?

a. chloro hydride c. calcium bromine e. silver chloride

b. lead sodide d. argon sulfide




  1. When an atom of lithium reacts with an atom of chlorine, which of the

following statement(s) is/are correct?

a. chlorine gains an electron c. lithium loses an electron e. none of these

b. an ionic bond is formed d. all of these


  1. Which of the following is NOT an example of an ionic compound?

a. NaCl b. CaCl2 c. KI d. NO2 e. MgI2


  1. This group of elements combines with metal elements to form salts:

a. alkali metals b. alkaline earth metals c. noble gases d. halogens


  1. An ionic compound has a net electrical charge of

a. –1 b. +1 c. 0 d +2


  1. Which of the following could possibly form a covalent bond with chlorine?

  1. Sodium b. magnesium c. lithium d. chlorine e. none of these




  1. Which of the following could possibly form an ionic bond with bromine (Br)? a. potassium b. chlorine c. oxygen d. fluorine e. none of these




  1. When an atom gains an electron, the atom becomes an ion that is

a. positively charged and gains a small amount of mass

b. positively charged and loses a small amount of mass

c. negatively charged and gains a small amount of mass

d. negatively charged and loses a small amount of mass

e. none of the above


  1. The ions in an ionic compound stay together because the ions:

  1. are attracted to each other because of their opposite electric charges

  2. both want to gain electrons, so neither will let them go

  3. both want to lose electrons, so neither will accept any more

  4. none of the above

18. What is represented in a Lewis dot structure?



  1. the element's symbol and number of valence electrons

b. the number of valence electrons only

c. the element's symbol and total number of electrons

d. the element's symbol and number of protons

e. none of the above


?:

19. An element that would have this Lewis dot structure is:

a. K b. Al c. Xe d. F e. none of these


  1. Which of the following pairs of elements would have the same Lewis dot configuration?

a. boron and selenium c. nitrogen and hydrogen

b. oxygen and selenium d. none of these




  1. Chlorine is a:

a. halogen b. alkaline earth c. noble gas d. transition metal


  1. Which of the following become stable by already having or by getting 8 electrons in their outermost energy level (following the octet rule)?

a. Cl b. O c. S d. Ar e. all of these
ABACUS CODE 3.1.2

CHEMISTRY SUBUNIT 2 TEST- BONDING - Form A


Integrated Science-1


You will need a Periodic Table to complete this exam.
Short Essay Questions (20 points)


  1. Make a table or a concept map that compares ionic, covalent, and metallic bonding. Include which kinds of elements form these bonds (i.e. metals or non-metals), what the electrons are doing, the strength of the bond, and the kind of compounds and/or elements formed. (10 points)




  1. Using Lewis Dot Structures, show how an ionic bond forms. Show electron movement, and show the correct Lewis Dot Structures for the resulting ions. You may choose the two elements to use for this bond. Make sure that they are two that would bond ionically. (5 points)




  1. Using Lewis Dot Structures, show how the compound methane (CH4) forms. Show the correct Lewis Dot Structures for the atoms of the elements involved and the resulting compound. (5 points)

ABACUS CODE 3.1.2



CHEMISTRY SUBUNIT 2 TEST- BONDING

Integrated Science-1



Bond Models Activity (20 points – 5 points each)
Use the materials provided to construct a model for each of these:


  1. an ionic compound




  1. a covalent compound with only single covalent bonds




  1. a covalent compound with at least one double covalent bond




  1. a covalently bonded element

Use only what you need, the materials must be used by other students as well as yourself. Leave things in a neat and clean condition.

ABACUS CODE 3.1.2

CHEMISTRY SUBUNIT 2 TEST- BONDING & MOLECULAR ATTRACTION

Integrated Science-1



Bond Models Activity

Teachers Guide

Various materials can be provided for the student, probably the same type you used when teaching bonding: paper patterns and tape, marshmallows and toothpicks, round stickers and coding dots in various colors, tinker toys, styrafoam balls and straws, etc. Labels or different colors would be needed to differentiate between covalent compounds and covalently bonded elements. If you wish to have a distinction between electron transfer and sharing, then some way of showing the origin of the transferred electron must be devised. Stickers and coding dots work for this, looking like Lewis dot structures:



Transfer - ionic

Sharing - covalent

+ -

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