Covalent Bonding and Shared Electrons Worksheet

Question 1

Which description represents a single covalent bond between two atoms?

1. A pair of electrons shared between the atoms
2. Two protons transferred between the nuclei
3. One electron taken completely from each atom
4. Two neutrons shared between the atoms

Question 2

Use shared electrons to explain how each hydrogen atom in H–H has a filled first energy level in the bonding model.

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Question 3

How many electrons are represented by the two lines in O=O?

1. 1
2. 2
3. 4
4. 8

Question 4

Water has the model H–O–H. Each line represents a shared pair. Where are the two remaining valence-electron pairs on oxygen located in a Lewis model?

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Question 5

Which model contains the greatest number of shared electrons between its atoms?

1. H–H
2. O=O
3. N≡N
4. All three are equal.

Question 6

Calculate the total number of valence electrons represented in the oxygen model, including shared and unshared electrons. Show the count.

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Question 7

What formula represents the nitrogen model?

1. N
2. N₂
3. N₃
4. N₆

Question 8

An exhibit label says the nitrogen model has six shared electrons and two unshared electrons in the whole molecule. Use the table to identify and correct the error.

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