Atoms, elements, compounds and mixtures

Elements are made up of only one type of __________

Which is the best example of a pure substance?

• pizza

• gold

• saltwater

• air

Tags

NGSS.MS-PS1-4

Which substance is a compound?

• copper

• magnesium

• saltwater

• water

Table salt, or sodium chloride has the chemical formula NaCl. How is sodium chloride classified?

• as an element

• as a compound

• as a mixture

• as a liquid

Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?

• compound

• mixture

• pure substance

• element

Elements can be broken down into simpler substances. 

• false 
• true 
• sometimes 

Tags

NGSS.MS-PS1-5

Classify the picture with the correct label.

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

Water is made up of two _______ atoms and one oxygen atom.

Compounds are made up of more than one type of atom that are __________ bonded together.