8th Unit 2 Test

8th Unit 2 Test

Assessment

Flashcard

Science

8th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

How many atoms are present if there is no subscript following the element symbol?

Back

1

2.

FLASHCARD QUESTION

Front

What does the law of conservation of matter state?

Back

Atoms are neither created nor destroyed in chemical reactions.

3.

FLASHCARD QUESTION

Front

How many Oxygen atoms are in the formula Al₂(CO₃)₃?

Back

9

4.

FLASHCARD QUESTION

Front

How many atoms are present in caffeine (C₈H₁₀N₄O₂)?

Back

24

5.

FLASHCARD QUESTION

Front

What are the substances that start a chemical reaction called?

Back

Reactants

6.

FLASHCARD QUESTION

Front

What is the definition of a chemical reaction?

Back

A process where reactants transform into products.

7.

FLASHCARD QUESTION

Front

What is a product in a chemical reaction?

Back

The substances formed as a result of a chemical reaction.

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