Elements, Compounds, and Mixtures

DIFFERENT kinds of atoms chemically bonded to form a substance are called

• Mixture

• Element

• Compound

• Substance

This contains a variety of elements and compounds that ARE NOT chemically combined.

• Water

• Mixture

• Elements

• Compounds

A pure substance...

• is an element or a compound
• is an element or a mixture
• is a compound or a mixture
• is a mixture

Tags

NGSS.MS-PS1-1

A compound is made of ________ atoms. 

• big 
• similar 
• different 

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?

• Compound
• Element
• Mixture
• None of the Above

Tags

NGSS.MS-PS1-4

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

• I

• II

• III

• IV

NaHCO₃ is an example of —

• an abbreviation
• a compound
• a mixture
• an element

Tags

NGSS.MS-PS1-1

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

• Oxygen is more reactive than air.

• Oxygen has a higher density than air.

• Oxygen goes under a phase change, whereas air is always a gas.

• Oxygen contains only one substance, but air contains several substances.