Download Subatomic Particles and the Nuclear Atom (4.2)

Bellringer
• COMPLETE SENTENCES!!!!
1) Where in an atom are the following
subatomic particles located: proton,
neutron, electron?
2) What is the charge on the following
subatomic particles: proton, neutron,
electron?
3) Who is credited with the discovery of the
following subatomic particles: proton,
neutron, electron?
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.
Three-Tab Foldable
• Three tab labels:
– Proton (p+)
– Neutron (n0)
– Electron (e-)
• What is the charge on each particle?
Location
• Protons - ?
• Neutrons - ?
• Electrons - ?
Relative Mass
• Protons = 1
• Neutrons = 1
• Electrons = 1/1840
• What does this tell you?
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?
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
1890’s
Assignment
1. Exit Slip: Describe (in writing or a
drawing) the structure of a typical atom.
Identify where each subatomic particle is
located.
2. Workbook: p. 19 (3-12); p. 20 (1-8)