Counting Atoms & Balancing Equations (SWS)

Counting Atoms & Balancing Equations (SWS)

Assessment

Flashcard

Science

8th Grade

Practice Problem

Hard

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

Standards-aligned

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the total number of atoms present in 5Na₃PO₄?

Back

40

Tags

NGSS.MS-PS1-1

2.

FLASHCARD QUESTION

Front

The red numbers in a chemical equation represent ________

Back

coefficients

3.

FLASHCARD QUESTION

Front

Balance the following equation: ___ Mg + ___ O₂ → ___ MgO

Back

2, 1, 2

Tags

NGSS.MS-PS1-5

4.

FLASHCARD QUESTION

Front

Is this balanced? 2HgO → 2Hg + O₂

Back

Yes

Tags

NGSS.MS-PS1-5

5.

FLASHCARD QUESTION

Front

How many atoms of Iron (Fe) are in 2Fe₂O₃?

Back

4

Tags

NGSS.MS-PS1-1

6.

FLASHCARD QUESTION

Front

What are subscripts in a chemical formula?

Back

Numbers that indicate the number of atoms of an element in a molecule.

Tags

NGSS.MS-PS1-1

7.

FLASHCARD QUESTION

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved.

Tags

NGSS.MS-PS1-5

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