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WorksheetsUnit 6 Lesson 1 Practice Lewis Structures
Total questions: 20
Worksheet time: 2hrs 35mins
When drawing lewis structures the goal is use only (a) electrons to fulfill the (b) rule of all atoms.
Why is this Lewis Structure incorrect? Select all that apply.
H atoms can only form single bonds before their octet is fulfilled.
There must be a triple bond between C and N to fulfill the octet of all atoms.
Not enough valence are pictured in the diagram.
Hydrogen needs more electrons.
Carbon is missing a lone pair in order to satisfy it's octet.
Why is this Lewis Structure incorrect? Choose all that apply.
There are too many bonds around the Si atom.
The structure only required two double bonds to fulfill the octet.
The Structure is missing a triple bond.
Each chlorine only has 6 electrons surrounding it.
How many total valence electrons were used in creating this lewis structure?
(a)
Unlike most elements, (a) only needs (b) electron(s) in its valence shell to be stable.
Reorder the following steps for drawing lewis structures
Count the Total Valence electrons
(add/subtract if there is a charge)
Draw the skeleton for the lewis structure using only single bonds
Add remaining electrons as Lone pairs (peripheral atoms first).
Check for octet.
Slide in double bonds where needed.
How many valence electrons does a Phosphorus atom have?
(a)
Click on the portion of this image that shows a lone pair of electrons.
Click on the portion of this image that shows a double bond.
Click on the portion of this image that shows a single bond.
How many valence electrons does an Oxygen atom have?
(a)
How many total valence electrons does NF3 have?
(a)
Draw the Lewis Dot structure for NF3 and determine how many lone pair electrons it has?
(a)
Calculate the total number of valence electrons for SiBr4
(a)
Draw the Lewis Dot structure for SiBr4 and determine how many lone pair electrons it has?
(a)
How many total valence electrons does phosphate PO43- have?
(a)
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
With only 2 elements there is no real central atom.
A
B
C
D
Which of the following is a covalent molecule and could have a Lewis Structure drawn?
NO2
MgCl2
CH4
H2O
Li2O
(a) form a (b) structure because of their opposite charges while (c) form (d) from shared valence electrons.
