Understanding Elements and Compounds

What is the main focus of this video?

• The difference between elements and compounds

• The history of chemistry

• The uses of different elements

• The structure of atoms

Which of the following is an element?

• H2O

• Fe

• MgO

• NaCl

How many known elements are there?

• 150

• 118

• 50

• 92

What defines a compound?

• A single element

• A mixture of elements

• Two or more different elements bonded together

• A substance found on the periodic table

Which of the following is a compound?

• Fe

• O2

• Al

• H2O