Chemistry Introduction

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

• Element

• Compound

• Mixture

• Solution

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

• Element

• Compound

• Colloid

• Suspension

Vinegar was added to baking soda, which resulted in bubbles. What type of change occurred?

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How would you classify this image?

• homogeneous mixture

• heterogeneous mixture

How many valence electrons does Silicon Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

Tags

NGSS.MS-PS1-1

How many valence electrons does Potassium Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

This shows a table salt molecule. What is it?

• compound

• element

• mixture

Tags

NGSS.MS-PS1-1

Which item on this element square is the chemical symbol?

• Copper

• 29

• Cu

• 63.546

Which of these samples shown best represents an element?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Made up of only 1 type of atom

• Compound

• Molecule

• Element

• Mixture

Tags

NGSS.MS-PS1-1