Understanding the Periodic Table

What are all things in the world made of?

• Compounds

• Molecules

• Atoms

• Cells

How many different kinds of atoms are there?

• 50

• 150

• 118

• 92

What is an element?

• A substance made of one kind of atom

• A mixture of different atoms

• A molecule

• A compound

What is the periodic table?

• A list of elements

• A list of mixtures

• A list of compounds

• A list of molecules

What is the atomic number of hydrogen?

• 3

• 2

• 4

• 1

How many horizontal rows are in the periodic table?

• 5

• 8

• 6

• 7

Where do the lanthanides and actinides belong in the periodic table?

• Rows 6 and 7

• Rows 5 and 6

• Rows 3 and 4

• Rows 1 and 2

How many elements are there in total?

• 92

• 100

• 118

• 150

What are Group 1 elements called?

• Halogens

• Alkali metals

• Alkaline earth metals

• Noble gases

Which group contains the noble gases?

• Group 18

• Group 17

• Group 2

• Group 1