Elements, Compounds and Mixtures

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

The difference between elements and compounds is that...

• elements can be separated by physical means and compounds cannot.
• elements cannot be separated by physical means and compounds can.
• elements contain only one kind of atom and compounds contain more than one kind of atom.
• elements contain more than one kind of atom and compounds contain only one kind of atom.

If an unknown substance CANNOT be broken down into simpler substances, it is 

• a compound
• an element
• a homogeneous mixture
• a heterogeneous mixture

What is the substance in the box?

• Element
• Compound
• Mixture of compounds
• Mixture of elements & compounds

How is a compound different from a mixture?

• Compounds have 2 or more componenets
• Each substance in a compound loses its characteristic properties
• Compounds are commonly found in nature
• Solids,liquids, & gases can form compounds

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

Tags

NGSS.MS-PS1-1

What kind of substance is composed of two or more elements that are chemically combined?

• element

• mixture

• solution

• compound

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

Tags

NGSS.MS-PS1-1