Multiple Choice
Which of the following correctly matches each element with the Lewis dot symbol for its most stable ion: sodium, oxygen, calcium, and chlorine?
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11. Bonding & Molecular Structure
Lewis Dot Symbols
Multiple Choice
How many unpaired electrons are in the Lewis symbol of an oxygen atom?
A
1
B
2
C
3
D
4
E
6
Verified step by step guidance1
Understand the concept of a Lewis symbol: A Lewis symbol represents the valence electrons of an atom as dots around the chemical symbol. For oxygen, which is in group 16 of the periodic table, it has 6 valence electrons.
Draw the Lewis symbol for oxygen: Start by placing the chemical symbol 'O' in the center. Then, distribute the 6 valence electrons as dots around the symbol. Place one dot on each of the four sides before pairing any electrons.
Identify the unpaired electrons: In the Lewis symbol, electrons are paired when two dots are placed together on one side. Since oxygen has 6 valence electrons, after placing one dot on each side, you will have two sides with paired electrons and two sides with unpaired electrons.
Count the unpaired electrons: Look at the Lewis symbol and count the dots that are not paired. These represent the unpaired electrons in the atom.
Conclude the number of unpaired electrons: Based on the distribution of electrons in the Lewis symbol, determine how many electrons remain unpaired.
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