Chapter 5 Chem
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Who is Louis de Broglie?
- suggested waves can behave as particles and particles can behave as waves
- This is called wave-particle duality
Who is Neils Bohr?
described atom as electrons circling around a nucleus and concluded that electrons have specific energy levels
Who is Erwin Schrodinger?
- proposed quantum mechanical model of atom, which focuses on wavelike properties of electrons
- - developed a compromise which calculates both the energy of an electron and the probability of finding an electron at any point in the molecule
- - This is accomplished by solving the Schrodinger equation, resulting in the wave function
Who is Werner Heisenburg?
- showed that its impossible to know or measure precisely both the position adn velocity or the momentum at the same time
- The simple act of "seeing" an electron would change its energy and therefore its position
**When you solve the equation, you end up with a series of solutions that are repalted to each other= __**
What do wave functions describe?
the behavior of electrons
What are the three components to the Schrodinger Equation?
Each wave function contains three variables called quantum numbers:
- principle quantum number (n)
- angular-momentum quantum number (l)
- magnetic quantum number (ml)
What does the Principle Quantum Number define?
As n increases, __
As n increases, __.
Each value of n is generally called a __.
- the size and energy level of the orbital
- the electrons get farther from the nucleus
- the electrons' energy increases
What does the Angular-Momentum Quantum number define?
For an orbital of principle quantum number n, the value of l can have an integer value from ___
This gives the subshell notation: __
- the 3D shape of the orbital
- 0 to n-1
- l= 0 (s orbital)
- l= 1 (p orbital)
- l=2 (d orbital)
- l=3 (f orbital)
- l= 4 (g orbital)
What does the magnetic quantum number define?
For orbital of angular-momentum quantum number l, the value of ml has integer values from __
This gives a spatial orientation of:
- the spatial orientation of the orbital
- -L to + L
- L=0, giving ml= 0
- L=1 giving ml= -1, 0, +1
- L= 2 giving ml= -2,-1,0,+1,+2
wHAT IS THE spIN qUANTUM nUMBER
The Pauli Exclusion Principle states that no two electrons can have teh same four quantum numbers
What is a node?
a surface of zero probability for finding the electron
What are regions of probability?
places you'll most likely find an electron
True or False:
L can be positive and negative.
False: it can never be negative
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