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Chemistry Definitions: The Atom
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Gravity
Terms in this set (10)
Dalton's Atomic Theory
All matter is made up of small particles called atoms which are indivisible and cannot be broken down into smaller particles
William Crookes
discovered the electron using Cathode ray tube
JJ Thompson
determined that electrons were negative and found E/M ratio
Robert Millikan
discovered size of electron's charge
oil drop experiment
Plum Pudding Model
solid positive sphere with electrons embedded
Rutherford
discovered the nucleus
fired alpha particles at gold foil
Chadwick
discovered the neutron by firing alpha particles at beryllium
Energy level
fixed energy value that an electron may have
Heisenberg's Uncertainty Principle
it is impossible to measure both velocity and position of electron at the same time
Orbital
region of space where there is a high probability of finding an electron
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Verified questions
CHEMISTRY
a. By using x and y, state the general equation for quantities that are directly proportional. b. For two directly proportional quantities, what happens to one variable when the other variable increases?
PHYSICAL SCIENCE
A 500-N student stands on one foot. A 750-N student stands on two feet. If both students wear the same size shoe, which exerts the greater pressure?
CHEMISTRY
Oil and water are immiscible. Which is the most likely reason? Oil molecules have higher vapor pressures than water.
CHEMISTRY
Lactic acid is produced by the muscles when insufficient oxygen is available and is responsible for muscle cramps during vigorous exercising. It also provides the acidity found in dairy products. Chemical analysis shows that lactic acid is 39.99% carbon, 6.73% hydrogen, and 53.28% oxygen by mass. A 0.3338-gram sample of lactic acid was vaporized in a sealed 300.0-milliliters container at $150.0^{\circ} \mathrm{C}$, production a pressure of 326 Torr. Use these data to determine the molecular formula of lactic acid.
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