Quantum Mechanics,Quantum Numbers
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March 03, 2016 |
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Quantum
Mechanics
•Quantum Mechanics = explains the
behavior of very SMALL, FAST moving objects
Quantum Mechanics
overview
•We will see: electrons have discrete
energies, not
because they are in shells but because they can only
have certain
wavelengths
•Line spectra are not due to electrons
jumping from shell
to shell (as in Bohr’s model)…
•Instead they’re due to electrons
transforming from one
wavelength (waveform) to another
•Each electron is a wave that can be
described by a
series of “quantum numbers”
•There are four quantum numbers: n, l, ml, ms
•The combination of the first 3 defines an
“orbital”
Classifying electron waves
•The waves of electrons are similarly class-ified
according to certain variables (n, l, ml)
•The rationale for the numbers is not always clear.
These numbers come from some pretty advanced
math. You don’t have to know why we use
certain
formulas for determining quantum numbers
.
You do have to know what the formulas are, when to use
them,
and what the resulting quantum numbers represent
Quantum Numbers
There
are four numbers that come into the theory of
electron clouds as waves called
quantum numbers.
The
first quantum number, n, is the principle energy
level.
This is the 1 in 1s2. It can have the
values 1, 2, 3, …
The
second quantum number, l, is the sublevel. The nth
principle energy level has n sublevels.
We refer to these
sublevels by letters: s, p, d, f, g, h, i, j, k, … Sometimes
numbers are used too: 0, 1, 2, 3,
…(n-1)
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Chemistry for class 11.....
Quantum Mechanics,Quantum Numbers,Quantum Mechanics,Quantum Numbers,Quantum Mechanics,Quantum Numbers,
sharma sir,scceducation,chemistry ,9718041826,free notes,free cbse study material,ncert solution,
sharma sir,scceducation,chemistry ,9718041826,free notes,free cbse study material,ncert solution,
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