Counting Atoms

Counting Atoms

Assessment

Flashcard

Chemistry

8th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the chemical formula for Magnesium Chloride?

Back

MgCl₂

2.

FLASHCARD QUESTION

Front

How many atoms of Hydrogen are in one molecule of water (H₂O)?

Back

2

3.

FLASHCARD QUESTION

Front

In the compound Al₂(SO₄)₃, how many total atoms are present?

Back

23 (2 Al + 12 O + 6 S = 20 total atoms)

4.

FLASHCARD QUESTION

Front

What is the total number of atoms in the compound C₆H₁₂O₆?

Back

24 (6 C + 12 H + 6 O = 24 total atoms)

5.

FLASHCARD QUESTION

Front

How many different elements are present in the compound C₆H₁₂O₆?

Back

3 (Carbon, Hydrogen, Oxygen)

6.

FLASHCARD QUESTION

Front

What is the significance of subscripts in a chemical formula?

Back

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

7.

FLASHCARD QUESTION

Front

How do you determine the number of Oxygen atoms in a compound with parentheses, such as Al₂(SO₄)₃?

Back

Multiply the number of Oxygen atoms in the sulfate ion (4) by the coefficient outside the parentheses (3), resulting in 12 Oxygen atoms.

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