The Periodic Table reading passage

What does the periodic table organize?

• Elements by their atomic mass

• Elements by their atomic number

• Elements by their chemical properties

• Elements by their color

What does the atomic number of an element represent?

• The number of neutrons in an atom's center

• The number of electrons in an atom's center

• The number of protons in an atom's center

• The number of molecules in an atom's center

Which group on the periodic table is known as the noble gases?

• Group 1A

• Group 2A

• Group 7A

• Group 8A

Which of the following is NOT a noble gas?

• Helium

• Argon

• Krypton

• Oxygen

What are molecules?

• The largest recognizable portion of an element or compound

• The smallest recognizable portion of an element or compound

• The heaviest part of an element or compound

• The lightest part of an element or compound

What happens when an element is combined with another element?

• A molecule is formed

• An atom is formed

• A compound is formed

• A neutron is formed

What is the periodic table designed to do?

• make a list of all of the known elements

• organize the elements by their atomic numbers

• organize the elements for easier use

• show the symbols for all of the elements

What do the squares on the chart represent?

• elements

• metals

• gases

• solids

What group is helium, argon and neon a part of?

• alkaline earth metals

• noble gases

• transition metals

• lanthanide series

How many classes of elements are represented on the chart?

• 6

• 7

• 8

• 9