Atomic Theory and the Periodic Table

His atomic theory contained 4 observations/inferences regarding atoms.

• J.J. Thomson

• John Dalton

• James Chadwick

• Niels Bohr

Tags

NGSS.MS-PS1-5

Discovered the neutron, which was the final piece of the modern atomic model.

• J.J. Thomson

• John Dalton

• James Chadwick

• Niels Bohr

Discovered the electron and created the “berries in a muffin” model to describe the structure.

• J.J. Thomson

• John Dalton

• James Chadwick

• Niels Bohr

Tags

NGSS.MS-PS1-1

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 atomic number of an element always tells you an atom's...

• Mass

• # of Protons

• Weight

• # of Neutrons

What is the location of tin (Sn)? Look at your periodic tables.

• Group: 14 Period: 5

• Group: 5 Period: 14

• Group: 14 Period: 4

• Group: 4 Period: 14

What is the location of zirconium (Zr)? Look at your periodic tables.

• Group: 4 Period: 4

• Group: 5 Period: 4

• Group: 4 Period: 5

• Group: 4 Period: 2

What is the location of argon (Ar)? Look at your periodic tables.

• Group: 3 Period: 18

• Group: 18 Period: 3

• Group: 18 Period: 2

• Group: 2 Period: 18

How many electrons does manganese (Mn) have? Look at your periodic tables.

• 54

• 55

• 25

• 30