unit 1 chemistry atoms

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  • Created by: Jaderose
  • Created on: 16-02-14 16:18
what the relative mass of an electron?
1/1840
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whats an isotope?
atoms of the same element that contain a different number of nuetrons
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give an example of a isotope
carbon-12, carbon-13, carbon-14,
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whats mass spectrometry?
acurate measurement to determine relative isotopic mass compared to carbon 12 and the relative abundance
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what are the uses of mass spectrometry?
carbon 14 dating, drug testing, forensic science and space exploration
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what does atomic number mean?
tells you the number of protons in the nucleus identifies the element
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what's the mass number?
total number of protons and neutrons in the nucleus
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why are the chemical properties of isotopes the same
its the number and arrangement of electrons that decide chemical properties and they have the same configuration of electrons
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why are the physical properties of an isotope different
physical properties depend more on the mass of an atom and neutrons effect the mass
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whats the relative atomic mass
average mass of an atom compared to 1/12 of carbon 12
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whats the relative isotopic mass
the mass of an atom of an isotope compared to 1/12 of carbon 12
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what the relative molecular mass
the average mass of a molecule compared to 1/12 of carbon 12
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whats the molecular mass of H2O?
h=1 0=16 molecular mass =(1x2)+16 = 18
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whats the molar mass of H2O?
the sane as the molecular mass 18g per mol
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how do you find the no of moles with molar mass
mass of substance/molar mass
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how do you find the no of moles with volume and concentration
concentration x volume when they are in dm3 or if not after divide by 1000
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Other cards in this set

Card 2

Front

whats an isotope?

Back

atoms of the same element that contain a different number of nuetrons

Card 3

Front

give an example of a isotope

Back

Preview of the front of card 3

Card 4

Front

whats mass spectrometry?

Back

Preview of the front of card 4

Card 5

Front

what are the uses of mass spectrometry?

Back

Preview of the front of card 5
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