U2: Lewis Structures: Mastery Test

Quiz
•
Science
•
9th Grade
•
Hard
Standards-aligned
Christopher Powers
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a molecule of methane, carbon (having four valence electrons) binds to four hydrogen atoms. How many lone pairs of electrons will be represented in the Lewis structure of methane?
four
two
one
zero
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in creating a Lewis structure for a molecule?
counting the number of lone pairs of electrons
counting the number of electron orbitals
counting the number of single bonds
counting the number of valence electrons
Tags
NGSS.HS-PS1-1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Select the correct answer. How many lone pairs of electrons are represented in the Lewis structure of a nitrate ion (NO₃⁻)?
4
8
12
24
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Select the correct answer. What is the total number of electrons shown in this Lewis structure of carbon dioxide?
8
12
16
24
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is the correct Lewis structure for fluorine, which is a group 7A element?
A
B
C
D
Tags
NGSS.HS-PS1-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is the correct Lewis structure for carbon tetrabromide (CBr₄), in which a central carbon atom is bound to four atoms of the group 7A element bromine?
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is the correct Lewis structure for carbon monoxide?
A
B
C
D
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
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