Coefficients and Subscripts Practice
Authored by Lauren Burke
Science
7th Grade
NGSS covered
Used 559+ times
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About
This quiz focuses on chemical formulas and equations, specifically targeting the fundamental concepts of coefficients, subscripts, and the Law of Conservation of Mass. The content is appropriate for 7th grade middle school science students who are beginning their study of chemistry basics. Students need to understand that subscripts indicate the number of atoms of each element within a compound, while coefficients multiply the entire formula to show how many molecules or formula units are present. They must master counting atoms by multiplying coefficients with subscripts, distinguish between reactants and products in chemical equations, and apply the Law of Conservation of Mass to understand that matter is neither created nor destroyed during chemical reactions. The questions progress from simple atom counting exercises to more complex scenarios involving parentheses in chemical formulas and conceptual understanding of chemical equation components. Created by Lauren Burke, a Science teacher in the US who teaches grade 7. This quiz serves as an excellent formative assessment tool to gauge student understanding of basic chemical notation before advancing to more complex chemistry topics like balancing equations and stoichiometry. Teachers can use this as a warmup activity to review previous lessons, assign it as homework to reinforce classroom instruction, or implement it as guided practice during direct instruction on chemical formulas. The quiz effectively supports student learning by providing immediate feedback on their ability to interpret chemical notation and apply conservation laws. This assessment aligns with NGSS 5-PS1-2 (conservation of matter) and supports the development of skills outlined in MS-PS1-5, helping students analyze and interpret data on the properties of substances before and after chemical interactions.
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18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many atoms of oxygen are in the 3O2?
3
2
6
5
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many atoms of oxygen are in this compound: 2AlCO3?
3
2
6
5
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many elements are here?
2
3
6
12
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the arrow pointing to?
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What are the arrows pointing to?
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many total hydrogen are in 2NaOH?
1
2
3
4
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following properly shows a situation where there are eight oxygen atoms? Assume you start with H2SO4
Tags
NGSS.MS-PS1-1
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