zSCI Chemistry (FDA) - Unit 14: Covalent Bonding
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Covalent Bonding


1) According to the atomic model, electrons orbit the atom's nucleus at specific levels or __________. 

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2) Electrons in the outermost shell, which are involved in chemical bonding, are known as _____________ electrons.

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3) In a _____________ bond, the atoms share electrons.

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4)

ChemThink! Covalent Bond Tutorial

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5) A covalent bond forms when ...
Incorrect
(D) is correct.

6)
Which formula matches:  diphosphorus pentoxide
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7) Identify all of the following combinations of elements that could form a covalent bond.





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8) How many electrons are the atoms pictured below sharing?
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9) In a covalent bond, the atoms are held together by ...
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10) How many electrons are the atoms pictured below sharing?
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11) How many electrons are the atoms pictured below sharing?
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12)
What is the name of the following formula:  CS2
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Electronegativity

 


13) What is the electronegativity difference between Carbon and Oxygen?
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14) What is the electronegativity difference between radium and bromine, if bromine's electronegativity is 2.8?
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15) Atoms with low electronegativity will strongly attract electrons.
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16) Why will Carbon and Hydrogen share electrons equally?

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Covalent Bonding


17) Covalent bonds occur between which type of atoms?
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18) __________ bonds share electrons.

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19) H2O is ...
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20) Covalent bonds result from the sharing of electrons.
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21) When two pairs of electrons are shared, a ______ covalent bond is formed.
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22) Covalent bonds tend to be stronger than ionic bonds.
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Covalent Bonds

Choose a substance, and then move electrons between atoms to form covalent bonds and build molecules. Observe the orbits of shared electrons in single, double, and triple covalent bonds. Compare the completed molecules to the corresponding Lewis diagrams.

23) In this model of a molecule of ammonia, NH3, how many covalent bonds are represented?

ammonia

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24) How many covalent bonds are there in one molecule of carbon dioxide, CO2?

O double bonded to C double bonded to O

Correct!

25) Extended Learning

Watch the following video, then write a five-sentence paragraph summarizing the video.


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26)

ChemLab:  Covalent Bonds

Student Exploration Lab Sheet

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