Elements, Compounds, and Mixtures Practice

What is an element?

• A substance that can be broken down into simpler substances

• A pure substance made of only one type of atom

• A mixture of different substances

• A combination of two or more elements

Which of the following is an example of an element?

• Carbon (C)

• Air

What is a compound?

• A mixture of different substances

• A pure substance made of only one type of atom

• A substance formed when two or more elements are chemically bonded

• A single element

Which of the following is a compound?

• Oxygen (O)

• Gold (Au)

• Helium (He)

Tags

NGSS.MS-PS1-1

What is the smallest unit of an element that retains its properties?

• Molecule

• Atom

• Compound

• Mixture

Which of the following statements is true about compounds?

• Compounds can be separated into their elements by physical means

• Compounds have properties similar to their constituent elements

• Compounds are formed by chemical reactions

• Compounds are mixtures of elements

Tags

NGSS.MS-PS1-5

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

• Compounds are made of one type of atom, mixtures are not

• Compounds have a fixed composition(made the same way), mixtures do not

• Compounds can be separated by physical means, mixtures cannot

• Compounds are always gases, mixtures are not

Match the term to the definition

• a substance made of two or more elements

• element

• the simplest form of a substance

• compound

• a combination of two or more substances that retain their individual properties

• mixture

Put the terms in the correct category

Groups:

(a) element

,

(b) compound

,

(c) mixture

• Water

• air

• Na

• Carbon
• NaCl
• saltwater
• Iron
• CO2
• cereal

• salad
• sugar

• Gold

• He

• sand
• Oxygen
• OH

• H2O2
• concrete

Tags

NGSS.MS-PS1-1

Organize these options into the right categories

Groups:

(a) element

,

(b) compound

,

(c) mixture

• 
• 
• 
• 
• 
• 
• 
• 
• 

Tags

NGSS.MS-PS1-1