Periodic Table and Atomic Theory

Revised the atomic model to include specific orbits or “shells” for electrons.

• J.J. Thomson

• John Dalton

• James Chadwick

• Niels Bohr

Performed the “gold foil” experiment & discovered that atoms have a central nucleus.

• J.J. Thomson

• Ernest Rutherford

• James Chadwick

• Niels Bohr

The _______________________ are dangerous when uncombined, but they easily bond with other elements to make salts.

• Metalloids

• Halogens

• Transition Metals

• Noble gases

The _______________________ are elements that don’t normally react with other elements and/or compounds and are found in our atmosphere in small quantities.

• Metalloids

• Halogens

• Transition Metals

• Noble gases

The _______________________ are extremely reactive, not found uncombined in nature, and must be stored under special conditions.

• Metalloids

• Alkali Metals

• Transition Metals

• Alkaline Earth Metals

In general, _______________________ are hard, shiny, and good conductors of heat and electricity.

• Metalloids

• Metals

• Transition Metals

• Non-metals

In general, _______________________ are poor conductors of heat and electricity, and can be solids, liquids or gases.

• Metalloids

• Metals

• Transition Metals

• Non-metals

Where is the Alkali metal group located?

• Red

• Orange

• Yellow

• Pink

Where are the Alkaline earth metals group located?

• Red

• Orange

• Yellow

• Pink

Where are the Noble gases located?

• Red

• Orange

• Yellow

• Pink