Chemical Formulas and Reactions

Chemical Formulas and Reactions

Assessment

Flashcard

Science

8th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the term for one or two letters used to represent an element?

Back

Symbol(s)

2.

FLASHCARD QUESTION

Front

What does the arrow symbol in a chemical equation represent?

Back

It shows that a reaction has taken place, often referred to as 'yields'.

3.

FLASHCARD QUESTION

Front

What is a sign of a chemical change?

Back

Unexpected color change.

4.

FLASHCARD QUESTION

Front

How can you tell a chemical reaction has occurred when baking?

Back

The ingredients cannot be returned to their original state.

5.

FLASHCARD QUESTION

Front

What is the main difference between a physical change and a chemical change?

Back

Chemical changes produce a new substance, while physical changes do not change the substance itself.

6.

FLASHCARD QUESTION

Front

What is the definition of a reactant in a chemical reaction?

Back

A substance that is present at the start of a chemical reaction.

7.

FLASHCARD QUESTION

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

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