Chapter 2- The Chemistry Of Life Flashcards
Protons and electrons
Are the same number in atoms
Describe electron energy levels
The first level only two electrons are allowed
The second and third levels allow eight
You must keep adding levels until you run out of electrons
Atomic mass equation
Protons + neutrons= atomic mass number
Explain the corollis effect
A mass moving in a rotating system experiences the corrollis force acting perpendicular to the direction of motion and to the axis of rotation
How fast do we spin
750 mph
Diff parts of the world spin at diff speeds
Hurricanes are never here
Equator Bc there is no corrollis effect there
How do hurricanes occur?
The winds in a thunderstorm start to spin. Bc the corrollis effect makes them spin. It becomes like a vacuum that sucks up warm air and uses that to move. Hurricanes are steered by other weather
The IPD
Inter pupillary distance. Is the distance between our pupils. You just adjust it on microscopes Bc if you don’t have to at the right distance you’ll see to images
How do you adjust the IPD
Using the IPD mechanism slowing bring them together till the two images turn into one
Eye tubes are
Adjustable to sharpen image
Total magnification of microscopes equation
Ocular x objective
Ex: 10x40=400 total magnification
The highest you can magnify in a compound microscope
1000x
What does the condenser do
Condenses the light
Most important part of microscope and why
Condenser Bc it contains the iris diapgram
The most misused and misunderstood part of microscopes
Iris diaphragm. It controls quality and sharpesss and not lighting
The power supply is
Used for light and darkness
Gram stains
The first step in the 48 hour process to determine which antibiotic is best for a particular bacteria.
Popular microbiology mistakes
A false positive and a false negative
Explain a false positive
You said someone had something but they really didn’t
False negative
The patient had something and you missed it. Much worse than a false positive Bc here are no backup tests and it could be fatal
What objective do you use to start looking at cells and why
10x. Never use anything bigger Bc it will come down and smash the slide of the objective.
What is the most expensive part of microscopes
The objectives
Atoms
Basic unit or structure of matter
What determines an element and it’s name
The number of protons
Neutrons and protons weigh
The same
Negative charges and positive charges are
The same strength
Electrons are — the size of protons and neutrons
1/1800th
The vast amount of atoms
Empty space