Unit 9 Quiz--Covalent Bonding

Multiple Choice (Choose the best answer.)

1. The element represented by [Ar] 4s² 3d¹⁰ 4p² has how many valence electrons?

   2

   4

   10

   12

   14

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2. The element represented by [He] 2s² 2p⁴ would have need to share how many electrons with another atom to achieve a noble gas configuration?

   2

   4

   6

   8

   None of these are correct.

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   Use the electron dot diagrams at right to answer the questions 3 - 6 below:

3. Which combination of elements would likely form a covalent bond?

   V and X

   V and Z

   W and Y

   W and Z

   Y and Z

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4. If two atoms of X and Z were to covalently bond to each other, what molecule would result?

   XZ

   X₂Z₃

   X₃Z

   XZ₃

   It is impossible to answer because two atoms of Y will not covalently bond .

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5. If two atoms of Y could covalently bond together, what type of bond would result?

   a single bond

   a double bond

   a triple bond

   a quadruple bond

   It is impossible to answer because two atoms of Y will not covalently bond .

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6. Which of the following molecules could be created by covalent bonding?

   VZ

   WY

   X₂Z₄

   Y₂Z₂

   None of These

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7. Covalently bonding normally occurs between which types of elements?

   metals only

   non-metals only

   metals and non-metals

   More than one of these are correct.

   None of these are correct.

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8. The structural drawing that indicates how F₂ bonds is:

   F - F

   F = F

   F = F

   More than one of these are correct.

   None of these are correct.

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9. The electron dot diagram that correctly shows the bonding in H₂N₂ is:

   

   

   

   

   

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10. The structural formula for the nitrite ion, NO₃ ^- is:

    

    

    

    

    

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