Bellringer

1
Bellringer

• COMPLETE SENTENCES!!!!
• Where in an atom are the following subatomic
  particles located proton, neutron, electron?
• What is the charge on the following subatomic
  particles proton, neutron, electron?
• Who is credited with the discovery of the
  following subatomic particles proton, neutron,
  electron?

2
Subatomic Particles and the Nuclear Atom

• Objectives
• 3.3 Utilizing benchmark discoveries to describe
  the historical development of atomic structure,
  including photoelectric effect, absorption, and
  emission spectra of elements
• 9.1 Identifying atomic and subatomic particles,
  including mesons, quarks, tachyons, and baryons
• Other AOD C.9.1 Describe the structure of
  atoms, including the location of protons,
  neutrons, and electrons.

3
Three-Tab Foldable

• Three tab labels
• Proton (p)
• Neutron (n0)
• Electron (e-)
• What is the charge on each particle?

4
Location

• Protons - ?
• Neutrons - ?
• Electrons - ?

5
Relative Mass

• Protons 1
• Neutrons 1
• Electrons 1/1840
• What does this tell you?

6
Actual Mass

• Proton 1.673 x 10-24 g
• Neutron ???
• Electron 9.11 x 10-28 g
• Do the math! How does the mass of an electron
  compare to the mass of a proton or neutron?

7
Discovery

• Proton
• Discovered by Ernest Rutherford in 1920
• Neutron
• Discovered by James Chadwick in 1932
• Electron
• 1st subatomic particle identified
• Formally identified by JJ Thomson in the late
  1890s

8
Assignment

• Exit Slip Describe (in writing or a drawing) the
  structure of a typical atom. Identify where each
  subatomic particle is located.
• Workbook p. 19 (3-12) p. 20 (1-8)