Pure substances vs. mixtures

Which substances are made of only one type of atom?

• Compound

• Element

Gold is a pure substance and an element because...

• It is made of one type of atom

• It is made of many different types of atoms

Carbon is ...

• ... not a pure substance because it is made of many different types of atoms

• .... a pure substance because it is made of many different types of atoms

• .... a pure substance because it is made of only one type of atom

In a single water molecule, there are

• only hydrogen atoms

• only oxygen atoms

• two hydrogen atoms and one oxygen atom

• two oxygen atoms and one hydrogen atom

Water is both a _____ and a ______.

• pure substance, element

• pure substance, compound

In one unit of sodium chloride, there is

• only sodium atoms, Na

• only chlorine atoms, Cl

• one sodium and one chlorine atom

Muddy water is not a pure substance because...

• it is only made of one type of particle, mud

• it is only made of one type of particle, water

• it is made of both water and mud

What substance is another type of mixture?

• Silver, which is made only of silver atoms

• Sugar, which is made only of sugar molecules

• Salad dressing, which is made of fat and oil and water and seasonings

• Calcium, which is made only of calcium atoms