Transcript • The Crookes Tube / Cathode Ray Tube helped scientists learn that… Copyright © 2010 Ryan P.

• The Crookes Tube / Cathode Ray Tube helped
scientists learn that…
Copyright © 2010 Ryan P. Murphy
• The Crookes Tube / Cathode Ray Tube helped
scientists learn that…
– A) Cathode rays were negatively charged particles,
which were later named electrons.
Copyright © 2010 Ryan P. Murphy
• The Crookes Tube / Cathode Ray Tube helped
scientists learn that…
– A) Cathode rays were negatively charged particles,
which were later named electrons.
– B.) Opposite charges tend to repel in the tube.
Copyright © 2010 Ryan P. Murphy
• The Crookes Tube / Cathode Ray Tube helped
scientists learn that…
– A) Cathode rays were negatively charged particles,
which were later named electrons.
– B.) Opposite charges tend to repel in the tube.
– C.) Protons make up the center of the nucleus.
Copyright © 2010 Ryan P. Murphy
• The Crookes Tube / Cathode Ray Tube helped
scientists learn that…
– A) Cathode rays were negatively charged particles,
which were later named electrons.
– B.) Opposite charges tend to repel in the tube.
– C.) Protons make up the center of the nucleus.
– D.) The neutron is slightly smaller than the proton.
Copyright © 2010 Ryan P. Murphy
• Which letter below represents the Rutherford
model of the atom, and which represents the early
J.J. Thompson model?
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• Please name A, B, C, and D?
– And name the atom?
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• The nucleus of the atom is…
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• The nucleus of the atom is…
– A.) Very dense.
Copyright © 2010 Ryan P. Murphy
• The nucleus of the atom is…
– A.) Very dense.
– B.) Very, very, dense.
Copyright © 2010 Ryan P. Murphy
• The nucleus of the atom is…
– A.) Very dense.
– B.) Very, very, dense.
– C.) Very, very, very dense.
Copyright © 2010 Ryan P. Murphy
• The nucleus of the atom is…
–
–
–
–
A.) Very dense.
B.) Very, very, dense.
C.) Very, very, very dense.
D.) Very, very, very, very dense.
Copyright © 2010 Ryan P. Murphy
• The nucleus of the atom is…
–
–
–
–
–
A.) Very dense.
B.) Very, very, dense.
C.) Very, very, very dense.
D.) Very, very, very, very dense.
E.) Very, very, very, very, very, dense.
Copyright © 2010 Ryan P. Murphy
An atom is mostly empty
space?
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What is a general name for this machine?
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What is a general name for this machine?
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What is a general name for this machine?
Copyright © 2010 Ryan P. Murphy
• Heisenberg Uncertainty Principle
– You can't know with certainty both where an electron
is and where it's going next. That makes it impossible
to plot an orbit for an electron around a nucleus. This
is also true for the Proton and Neutron.
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
– A.) J.J. Thompson Model
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
– A.) J.J. Thompson Model
– B.) Neils Bohr Model
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
– A.) J.J. Thompson Model
– B.) Neils Bohr Model
– C.) Sir William Crookes
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
–
–
–
–
A.) J.J. Thompson Model
B.) Neils Bohr Model
C.) Sir William Crookes
D.) Albert Einstein
Copyright © 2010 Ryan P. Murphy
• This scientist described the atom as a small,
positively charged nucleus surrounded by electrons
that travel in circular orbits around the nucleus.
–
–
–
–
–
A.) J.J. Thompson Model
B.) Neils Bohr Model
C.) Sir William Crookes
D.) Albert Einstein
E.) Simon Isotope
Copyright © 2010 Ryan P. Murphy
• Please record the following.
– Atomic Number = ______________
– Number of Protons = ____________
– Number of Neutrons = ___________
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What element are we looking at here?
-How many P+, E-, and N.
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What element is this?
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What is the name of this element?
How many neutrons does it have?
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• Carbon C-14 is an examples of this which is
just a heavier form of an element because it has
more neutrons than protons.
Copyright © 2010 Ryan P. Murphy
• Physicists have discovered that protons and
neutrons are composed of even smaller particles
called quarks.
– Just larger than an electron.
Copyright © 2010 Ryan P. Murphy
Please put the following terms in order
from largest to smallest.
- Atom
- Molecule
- Proton
- Electron
- Neutron
- Quark
- Nucleus
Copyright © 2010 Ryan P. Murphy