Lewis Dot Structures
Agenda
Atomic Theory Polka
Review # of subatomic particles and Bohr’s
Model
Notes on Lewis Dot Structures
Practice, Practice, Practice
Atomic Theory Polka
Dalton, Thomson, Rutherford and Bohr.
Schroedinger and Heisenburg, and many,
many more. Used their brains to venture in
the realm of inner space and found the world
of the atom was a weird and wondrous place.
Dalton did experiments and said, “I think it’s
clear, atoms are tiny indestructible spheres.”
Thomson worked with cathode rays and said,
“I disagree. A plum-pudding model makes
much more sense to me.”
A new chapter in atomic theory started to unfold
when Rutherford played around with atoms
made of gold. When a few of his alpha particles
came bounding back, he hypothesized a
nucleus had knocked them off the track.
Dalton, Thomson, Rutherford and Bohr.
Schroedinger and Heisenburg, and many,
many more. Used their brains to venture in
the realm of inner space and found the world
of the atom was a weird and wondrous place.
Bohr saw spectral lines for hydrogen and
said, “It seems to me.. Electrons move in
orbits with specific energies.”
electron
neutron
proton
Heisenberg said, “Forget it, there’s no way to
know the orbit or a path, where the electron’s
gonna go.”
Schroedinger used lots and lots of fancy
mathematics, and made a model of the atom
based on quantum mechanics. It has orbitals
and those are based on probability. The
atom is a fuzzy blob of pure uncertainty.
Dalton, Thomson, Rutherford and Bohr.
Schroedinger and Heisenburg, and many,
many more. Used their brains to venture in
the realm of inner space and found the world
of the atom was a weird and wondrous place.
14
6C
Number of subatomic particles:
Protons
Electrons
Neutrons Bohr’s Model
32
16S
Number of subatomic particles:
Protons
Electrons
Neutrons Bohr’s Model
16
8O
Number of subatomic particles:
Protons
Electrons
Neutrons Bohr’s Model
Lewis Dot Structures
Date:
Lewis Dot structures
Drawing Bohr’s model can be tedious, so we
use Lewis dot structures using only the
valence electrons.
Homework
Objectives worksheet chp 4
Draw the 3rd Period
Subatomic Particles.