This lecture covers the Rutherford and Bohr atomic models and is 51 minutes long.
Interestingly, the teacher has the class memorize the periodic table. They are given a blank periodic table and ten minutes.
There are mneuomonics for the lanthanides and actinides:
lazy college professors never produce sufficiently education graduates to dramatically help executives trim yearly losses.
La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
The atom is neutral. Negative charge carried by e-. E- is very tiny with small mass. Most of the mass is carried by the positive charge. What is the spatial distrution of the atom?
Thompson: Electrons distributed throughout uniformly charged positive sphere. Plum pudding model. First modern atomic model. No protons in this model. Custard is the positive charge, raisens are electrons.
Rutherford tested the PP model. From New Zealand on a farm, family of 12. An alpha particle is He2+. When you get the nobel prize, you can put your feet up. Gold is noble and it doesn’t oxidize. Graduate students are cheap, abundant labor. Made the nuclear model puts the positive charge on the inside.
Acceleration means a change in speed or direction. Why doesn’t the electron collapse into the nucleus?
Modern chemists need to be able to quantify predictions.
Niels Bohr made a quantifiable model. Classical EM theory does not apply to the orbiting e-. Newtonian mechanics does. Planetary model, electron orbiting the nucleus. When an elephant has fleas, the fleas do the jumping. The nucleus doesn’t move.
Hydrogen 1 in 1766 by Cavendish. H2 in 1931 by Urey. Tritium in 1934 by Ruther ford.
peat, lignite, sub bitiminous, bitminous, anthrocyte
Size up the situation, use all your senses, undue haste makes waste, remember where you are, value living, improvise, vanquish fear and panic, act like the natives, live by your wits, learn the basics.
Biological macromolecules: nucleic acid, proteins, lipids, carbohydrates.
glucose + glucose = maltose
glucose + fructose= sucrose
glucose + galactose= lactose
Tissues: nerve, muscle, epithelial, connective
Epithelial: simple/stratified/pseudo, cuboidal/columnar/squamous/transitional
PV = nRT, point source, high temp, low pressure
HA HA MICEN
H = Hydrogen
A = Anhydrous Ammonia
H = Helium
A = Acetylene
M = Methane
I = Illuminating Gas
C = Carbon Monoxide
E = Ethylene
N = Nitrogen
II. FIRE PHASES
A. 1st Phase – (Incipient or Growth)
1. 02 = 21%
2. Temperature is slightly elevated
B. 2nd Phase – (Free Burning or Fully Developed)
1. 02 = 17%
2. Fire burns at slower rate
3. Temperature is above 1300oF.
C. 3rd Phase – (Smoldering or Decay)
1. 02 = 15%
2. Temperature is above 1000oF.
3. Gas/smoke are heated, expand, causing pressure inside structure
4. Internal pressure forces smoke/gases from all cracks/openings
5. If 02 introduced at this stage = prime opportunity for backdraft