# Chemistry 20A

### 20 terms by Deluxe207

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### What is a Node

It is the point of zero displacement, no electrons are found

### What is a radial Node

It is a spherical surface where the probability of an electron being found is 0 and the probability density equals 0 as well

### What is a n Angular Node

It is a plane dividing wave functions by phase (dividing neg and positive)

n-1

n-l-1

### Formulas: # of angular nodes

l ( angular momentum #)

### 3s orbitals have __ radial nodes and __ angular nodes

2 radial nodes and 0 angular nodes

### 5p orbitals have __ radial nodes and __ angular nodes

3 radial nodes and 1 angular nodes

### 8d orbitals have __ radial nodes and __ angular nodes

5 radial nodes and 2 angular nodes

### Radial probability density depends on # of ...

Radial probability depends on number of RADIAL NODES b/c the probability of an electron existing there is 0

### Paramagnetic

attracted to magnetic fields b/c not all electron are paired up to MAXIMIZE DIRECTION

### Diamagnetic

Repulsed by magnetic fields b/c electrons are paired up

### When dealing with prbability density, what does the dv stand for? and what does it equal?

dv=change in volume and it equals 1 because highest value of probability is 1 (unless otherwise specified what volume your are give, i.e., over 1nm cubed volume)

### units of probability is usually

usually A to the -3/2 power

### If you have a well defined amplitude and wavelength, what can you tell about the uncertainty of the position and momentum

It would have a lager uncertainty for position but a small uncertainty for its momentum

### momentum and position are ___ related

inversely related (as one goes up, the other goes down)

### the letter Q is...

Q is the charge of a particle

### R is the...

R is the distance btwn nuclei

### Z is the...

nuclear charge (atomic number)

### Units of Probability desity is

A to the -3rd power (b/c you square it)

Example: