Elements, Compounds, and Mixtures Explained

This video tutorial provides an introduction to basic chemistry, focusing on elements, compounds, and mixtures. It explains the differences between these substances, how they are formed, and their properties. The video also covers the periodic table, chemical formulas, and provides examples of each type of substance. Additionally, it discusses the types of mixtures, including homogeneous and heterogeneous mixtures, and their characteristics.

What is a pure substance that cannot be broken down into simpler substances by physical or chemical means?

• Mixture

• Compound

• Element

• Solution

Which of the following is an example of a compound?

• Oxygen (O2)

• Water (H2O)

• Gold (Au)

• Helium (He)

Tags

NGSS.MS-PS1-1

What is the chemical formula for table sugar?

• CO2

• C12H22O11

• NaCl

• H2O

Tags

NGSS.MS-PS1-1

What is the chemical formula for carbon dioxide?

• C2O

• C2O2

• CO2

• CO

Tags

NGSS.MS-PS1-1

What is the main difference between a mixture and a compound?

• Mixtures are chemically combined, compounds are not

• Compounds can be separated physically, mixtures cannot

• Mixtures retain the properties of their components, compounds do not

• Compounds have variable composition, mixtures have definite composition

Which of the following is a homogeneous mixture?

• Chicken noodle soup

• Pizza

• Tossed salad

• Lemonade

Which of the following is an example of a heterogeneous mixture?

• Chicken noodle soup

• Milk

• Air

• Salt water

What type of mixture is Italian dressing?

• Element

• Solution

• Suspension

• Colloid

Which of the following is a property of a colloid?

• Particles are heavy enough to settle out

• Appears as a single substance

• Can be both homogeneous and heterogeneous

• Particles settle out quickly

Which of the following is an example of a suspension?

• Muddy water

• Mayonnaise

• Lemonade

• Salt dissolved in water