Onramps Chemistry Unit 2 review
Authored by Cem Kevser
Science
10th Grade
NGSS covered
Used 17+ times
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About
This quiz comprehensively covers chemical bonding and molecular geometry, fundamental topics in high school chemistry appropriate for 10th grade students. The questions assess students' understanding of Lewis structures, formal charge calculations, VSEPR theory, molecular polarity, hybridization, and molecular orbital theory. Students need to master electronegativity trends and bond polarity, accurately draw Lewis structures while considering resonance and formal charges, apply VSEPR theory to predict three-dimensional molecular shapes, understand how lone pairs affect bond angles and overall geometry, distinguish between electron geometry and molecular geometry, determine molecular polarity based on shape and bond polarities, comprehend hybridization concepts including expanded octets, and apply molecular orbital theory to calculate bond orders and predict bond lengths. The progression from basic Lewis structures to advanced molecular orbital theory creates a logical sequence that builds foundational knowledge before introducing more complex concepts. Created by Cem Kevser, a Science teacher in the US who teaches grade 10. This quiz serves as an excellent comprehensive review tool for students preparing for unit assessments on chemical bonding and molecular structure. Teachers can implement this quiz as a formative assessment to identify areas where students need additional support, assign it as homework to reinforce classroom learning, or use individual questions as warm-up activities to begin class discussions about specific bonding concepts. The variety of question types allows for differentiated instruction, with some questions focusing on recall and recognition while others require higher-order thinking and analysis. This assessment aligns with NGSS HS-PS1-3 (planning and conducting investigations to gather evidence about molecular interactions) and supports Common Core mathematical practices through quantitative reasoning in bond order calculations and geometric analysis. The quiz effectively prepares students for standardized assessments and advanced placement chemistry courses by emphasizing both conceptual understanding and practical application of bonding theories.
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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Consider the labeled bonds in the molecule below and rank them from least to most polar in terms of difference in electronegativity.
d < c < a < e < b
d < c < e < a < b
a < b < c < d < e
d < c < d < e < a
e < b < d < c < a
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Practice exam problem for formal charge: What is the formal charge on the nitrogen atom in ammonia?
-1
1
0
2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Practice exam problem for drawing: Which of the following compounds does not have unpaired electrons on the central atom?
NH₃
H₂O
CH₄
PH₃
Tags
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the correct Lewis structure of ethynol (C₂H₂O)?
H – C = C = O – H
H – C ≡ C – O – H
H – C ≡ C = O – H
H – C ≡ C = O – H
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following compounds does not exhibit resonance?
CH₄
O₃
NO₃⁻
CO₃²⁻
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following molecular geometries is not associated with an expanded valence?
Trigonal pyramidal
Seesaw
Linear
Octahedral
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the number of electrons around the central atom in XeF₄?
10
4
8
12
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