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3.8: Unit 3 Practice Problems

  • Page ID
    260635
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    Question 1

    The loss of electrons from an atom is called __________.

    Answer

    oxidation

    The gain of electrons by an atom is called ___________. 

    Answer

    Reduction

    An atom with a charge (either positive or negative) is called __________.

    Answer

    ion

    A positively charged atom is called _________.

    Answer

    cation

    A negatively charged atom is called _________.

    Answer

    anion

    Question 2

    Name the following ionic compounds.

    MgS

    NaCl

    Ca3N2

    KOH

    AlPO4

     
    Answer

    magnesium sulfide 

    sodium chloride

    calcium nitride

    potassium hydroxide

    aluminum phosphate

    Question 3

    Given the following electronegativity values, determine the type of bond (polar covalent, nonpolar covalent, or ionic) which will occur between the atoms below.    

     

    clipboard_e3980d7d82f90af13b3b7285da795f529.png

    Li - F

    C - O

    C - H

     
    Answer

    Li - F: ionic bond

    C - O: polar covalent bond

    C - H: nonpoloar covalent

    Question 4

    Given the name, write the formula for the following compounds.  

    calcium bromide

    magnesium nitrate

    iron (III) oxide

    silver (I) sulfide

    ammonium hydrogen phosphate

    Answer

    CaBr2

    Mg(NO3)2

    Fe2O3

    Ag2S

    (NH4)2HPO4

    Question 5

    Write Lewis structures for the following:

    (a)   H2

    (b)   HBr

    (c)   PCl3

    (d)   SF2

    (e)   C2H4

    (f)   NO-

    (g)  CN

    Answer a

    Screen Shot 2018-12-31 at 2.21.44 PM.png

    Answer b

    clipboard_e963962fec34c3c8fbc1c35e0b1e88424.png

    Answer c

    clipboard_e5ccf99a78d5729f609adf74d223eb605.png

    Answer d

    Screen Shot 2018-12-31 at 2.21.54 PM.png

    Answer e

    Screen Shot 2018-12-31 at 2.22.01 PM.png

    Answer f 

    Screen Shot 2018-12-31 at 2.22.12 PM.png

    Answer g

    clipboard_e40e1c7285f192372b275c1c7caa003e4.png


    3.8: Unit 3 Practice Problems is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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