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6.02 x 1023
NAME: Avogadro's Number
WHAT: It tells you the number of atoms in a mole or the number of molecules in a mole of a substance.
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9.1x10-31kg
NAME: Mass of an Electron
WHAT: We talk about electrons spinning around the nucleus of an atom. Well the me is the mass of one of those electrons.
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1.675x10-24g
NAME: Mass of a Neutron
WHAT: In the nucleus of an atom there are neutrons and protons. A neutron has this much mass.
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1.673x10-24g
NAME: Mass of a Proton
WHAT: In the nucleus of an atom there are neutrons and protons. A proton a mass of this amount.
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6.63x10-34Js
NAME: Planck's Constant
WHAT: Max Planck figured out that energy can be gained and lost by an atom. He used this constant to figure out how much energy. The "J" stands for Joules.
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3x108m/s
NAME: Speed of Light (in a vacuum)
WHAT: Scientists figured out that light always travels at the same speed in a vacuum. The number is really 299,792,458 meters per second, but we abbreviate it.
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9.8 m/s2
NAME: Acceleration of Gravity of Earth
WHAT: What if you drop a ball from a height? It speeds up as it falls. The amount it speeds up (acceleration) is because of gravity.
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1.66x10-27kg
NAME: Atomic Mass Unit (also called a Dalton)
WHAT: It is 1/12 the mass of a Carbon-12 atom. It is the basis for figuring out the mass all other atoms.
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1.6x10-19C
NAME: Charge of an Electron
WHAT: This is the charge of one electron flying around the nucleus.
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.082 Latm/molK
8.3 J/molK
1.987 cal/Kmol
NAME: Universal Gas Constant
WHAT: This constant is used in the Universal Gas Law "PV=nRT". It has the same value for all gases. You use a different value depending on what measurements your formula uses.
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