Counting Atoms Flashcard

Counting Atoms Flashcard

Assessment

Flashcard

Science

7th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What do subscripts represent in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

2.

FLASHCARD QUESTION

Front

How many carbon (C) atoms are in the formula 2Na₂CO₃?

Back

There are 2 carbon (C) atoms.

3.

FLASHCARD QUESTION

Front

Which of the following chemical formulas are the products? CH₄ and 2O₂, 2O₂, CO₂, CO₂ and 2H₂O

Back

The products are CH₄ and 2O₂.

4.

FLASHCARD QUESTION

Front

Is rusting a chemical or physical change?

Back

Rusting is a chemical change.

5.

FLASHCARD QUESTION

Front

What type of change occurs during an explosion?

Back

An explosion is a chemical change.

6.

FLASHCARD QUESTION

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the number and type of atoms in a molecule.

7.

FLASHCARD QUESTION

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance.

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