Elements, Compounds and Mixtures

Why is water not an element?

• It is made of hydrogen and carbon atoms

• It is made of oxygen and hydrogen atoms

• It is made of oxygen atoms

• It is made of hydrogen atoms

Tags

NGSS.MS-PS1-1

Which of the following is not a compound?

• HCl

• Cl

• NaCl

• CO2

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O

• H₂

• NaCl

• CaCO₃

Tags

NGSS.MS-PS1-1

It is a combination of two or more substances in which each substance maintains its physical property.

• Solution

• Mixture

• Solubility

Which of these is not a mixture? 

• oil and water

• sand and soda

• diet soda

• all are mixtures

Which of the following is NOT a pure substance?

• milk

• oxygen

• water

• carbon dioxide

chlorine gas, Cl₂, is an example of a(n)

• element

• compound

• mixture

Tags

NGSS.MS-PS1-1

bronze, an alloy of many different metals, is an example of a( n)

• element

• compound

• mixture

Examples are milk and gasoline.

• elements

• mixtures

• compounds

Tags

NGSS.MS-PS1-1

What is salad?

• element

• compound

• mixture