Elements, Compounds, and Mixtures Explained

The video tutorial introduces key chemistry terms: elements, compounds, and mixtures. It explains that elements consist of one type of atom, compounds are chemically combined atoms of different types, and mixtures are combinations of substances not chemically bonded. Using models, the video illustrates these concepts and provides examples to help viewers distinguish between them.

What are the three key terms introduced in the video?

• Proton, Neutron, Electron

• Atom, Molecule, Solution

• Element, Compound, Mixture

• Solid, Liquid, Gas

Tags

NGSS.MS-PS1-1

How many elements have been discovered so far?

• 92

• 150

• 100

• 118

What defines an element?

• Made of only one type of atom

• Made of compounds

• Made of multiple types of atoms

• Made of molecules

Tags

NGSS.MS-PS1-1

Which of the following is NOT an element?

• Oxygen

• Hydrogen

• Water

• Gold

What do we call a substance that contains two or more types of atoms chemically combined?

• Element

• Mixture

• Compound

• Solution

What is a mixture?

• Two or more substances not chemically combined

• A single type of atom

• A single type of molecule

• Two or more substances chemically combined

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

• Air

• Water

• Carbon dioxide

• Salt

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

• Salt water

• Gold

• Hydrogen gas

• Oxygen gas

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

• Compounds are found on the periodic table, mixtures are not

• Compounds are chemically combined, mixtures are physically combined

• Compounds are physically combined, mixtures are chemically combined

• Compounds contain only one type of atom, mixtures contain multiple types

After watching the video, what should you feel more confident in defining?

• Atoms and molecules

• States of matter

• Elements, compounds, and mixtures

• Chemical reactions

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4