Midterm Chemistry 2024-2025- Mrs. Chacon

Midterm Chemistry 2024-2025- Mrs. Chacon

Assessment

Flashcard

Chemistry

7th - 10th 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 main job of engineers?

Back

Solving problems.

2.

FLASHCARD QUESTION

Front

What happens when baking soda and vinegar combine?

Back

They undergo a chemical change to produce carbon dioxide.

3.

FLASHCARD QUESTION

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

4.

FLASHCARD QUESTION

Front

What is the density of an object if its mass is 1g and its volume is 2cm³?

Back

Density = Mass/Volume = 1g/2cm³ = 0.5 g/cm³.

5.

FLASHCARD QUESTION

Front

What is the mass number of an atom with 20 protons, 19 electrons, and 18 neutrons?

Back

Mass number = 20 protons + 18 neutrons = 38.

6.

FLASHCARD QUESTION

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

7.

FLASHCARD QUESTION

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

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