Counting Atoms & Balancing Equations

Counting Atoms & Balancing Equations

Assessment

Flashcard

Science

6th Grade

Practice Problem

Hard

NGSS
MS-PS1-5, MS-PS1-1, MS-PS1-2

Standards-aligned

Created by

Wayground Content

FREE Resource

Student preview

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15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Tags

NGSS.MS-PS1-5

2.

FLASHCARD QUESTION

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

3.

FLASHCARD QUESTION

Front

What are coefficients in a chemical equation?

Back

Coefficients are numbers placed in front of the chemical formulas to indicate how many molecules or moles of a substance are involved in the reaction.

4.

FLASHCARD QUESTION

Front

How do you determine the number of atoms in a compound?

Back

To determine the number of atoms in a compound, look at the subscripts in the chemical formula. If there is no subscript, it means there is one atom of that element.

Tags

NGSS.MS-PS1-1

5.

FLASHCARD QUESTION

Front

What is the subscript in a chemical formula?

Back

A subscript is a small number written to the right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule.

6.

FLASHCARD QUESTION

Front

How many oxygen atoms are in Al(OH)3?

Back

There are 3 oxygen atoms in Al(OH)3.

Tags

NGSS.MS-PS1-1

7.

FLASHCARD QUESTION

Front

What is the balanced equation for the reaction of carbon monoxide and iron(III) oxide?

Back

The balanced equation is 3CO + Fe2O3 --> 2Fe + 3CO2.

Tags

NGSS.MS-PS1-5

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