Chapter 7(Light and Into to Quantum) Flashcards
What is the speed of light?
c= 3 x 10^8
Light doesn’t need a _________, but most mediums do not ________it down appreciably
- Medium
- Slow
What is wavelength
-Distance between two successive peaks or troughs
-Units are length units
What is Frequency (v)
-Number of waves per second that pass a given point in space.
-Units are Hertz
(Hz= cycles/ sec= 1/sec=s^-1
Light that can also be thought of as a particle is a..
Photon
What is the foundation of quantum theory?
Very small objects that can be treated as waves.
If light can be though of as ________, then light energy is made up ______ _______ ______?
- Particles
- Packets(quanta) of light.
If light can be thought of particles, then……
- Particles can be thought of as waves.
Why doesn’t an electron crash into the nucleus?
- Centrifugal Force, An electron is always moving.
What does the Schrödinger Equation describe?
The energy of an electron is much more complicated than the energy of a photon.
What do electrons have?
-They are shared in covalent bonding.
-They are transferred to make ionic bonds.
- they are the reason the periodic table is shaped the way it is.
The shape of an atomic orbital is associated with?
The angular momentum quantum number(l)
What is the description of n= Principal Quantum Number? What does it determine?
n= 1,2,3,4,5….infinity
1. It determines the size of orbital and the total energy of orbital. (the most general part of an electrons “address”) (city)
What is the allowed vales of Orbital Angular Momentum Quantum Number (l)? What is the letters: s,p,d,f,g,h
0,1,2,3,4,5..(n-1)
what does the Magnetic Quantum Number (ml)determine?
The orientation of orbital in space.
The spin Quantum Number (m s) Does what with directions?
Leads to two possible directions of electron spin which is up and down.
What does the Pauli Exclusion Principle does not allow?
No two electrons in same atom can have same set of all four quantum numbers (n, l ml, ms
How many electrons does the Pauli Exclusion Principle?
Can only have two per orbital
Two electrons in _______ _______ must have _______ ________
- Same
- Orbital
- Opposite
- Spin
What is the Aufbau principal
Building-up principle (Put electrons in the lowest energy orbitals first)
What is the Pauli Exclusion Principle
Two electrons per orbital
* Fill following the order
suggested by the periodic
table
* Spins must be paired
What is Hund’s rule?
If you have more than one orbital all at the same energy
