Periodic Table

• Periods
• Groups

• Periods
• Groups

• energy levels
• valence electrons
• protons
• neutrons

• energy levels
• valence electrons
• protons
• neutrons

• Group 1
• Group 17
• Group 2
• Group 18

• Group 1
• Group 17
• Group 18
• Group 2

The number at the bottom of each square on the periodic table is the ...

• atomic number
• atomic mass
• chemical symbol
• element name

The number at the top of each square on the periodic table is the ...

• atomic number
• atomic mass
• Chemical Symbol
• Element Name

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases