Chemistry AS

DEFINITIONS :)

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  • Created by: 94Y86
  • Created on: 03-10-12 18:24
Isotopes
Atoms of the same elements with different numbers of neutrons
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Atomic number
The number in the nucleus of an atom
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Mass number
The number of particles in the nucleus (protons and neutrons)
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Relative Isotopic mass
The mass of an atom of an isotope compared to 1/12th ofthe mass of an atom of carbon-12
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Relative Atomic mass
The weighted mean mass of an atom of an element compared to 1/12th of the mass of an carboon-12 atom
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Relative Molecular mass
The weighten mean mass of a molecule compared with 1/12th of the mass of a cabon-12 atom
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Relative formula mass
the weighted mean mass of the formula unit compared with 1/12th the mass of an atom of carbon-12
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The mole
The amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isoptope
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Avagadros constant
6.02 X 10^23 mol^-1
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Molar mass
The mass per mole of a substance, usually measued in g mol^-1
10 of 10

Other cards in this set

Card 2

Front

The number in the nucleus of an atom

Back

Atomic number

Card 3

Front

The number of particles in the nucleus (protons and neutrons)

Back

Preview of the back of card 3

Card 4

Front

The mass of an atom of an isotope compared to 1/12th ofthe mass of an atom of carbon-12

Back

Preview of the back of card 4

Card 5

Front

The weighted mean mass of an atom of an element compared to 1/12th of the mass of an carboon-12 atom

Back

Preview of the back of card 5
View more cards

Comments

hungryhannah

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sorry but i dont think atomic number is 'the number in the nucleus of an atom'?

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