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20 Cards in this Set
- Front
- Back
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Protons have a relative mass of what?
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1
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Protons have a relative charge of what?
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+1
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Neutrons have a relative mass of what?
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1
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Neutrons have a relative charge of what?
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0 (Neutral, it has no charge)
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Electrons have a relative mass of what?
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1/1836 or 5.4 x 10(to the power of minus 4)
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Electrons have a relative charge of what?
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-1
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Isotopes are atoms that have the same number of what?
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Protons
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What is the job of the mass spectrometer?
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It is used to analyze samples of elements
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In the mass spectrometer what is ionisation?
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Sample is ionised, so the particles in the sample can be accelerated and deflected in the middle two stages.
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What does this mean?
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High energy electrons hit atoms in the sample and knock out 1 electron from them. This means they become ions with single positive charges
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State the equation for ionising a sample of magnesium
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Mg(g) + e- -> Mg+(g) + 2e-
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What is the m/z ratio of 7Li+?
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7/1=7
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How do you work out the relative atomic mass of an element?
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Ar= sum of (m/z x relative abundance) divided by the sum of relative abundances
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s sub levels can hold....
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2 electrons
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p sub levels can hold...
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6 electrons
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what is the electron configuration of sodium?
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1s2 2s2 2p6 3s1
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State the general equation for the first ionisation energy
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M(g) ->> M+(g) + e-
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What happens to the first ionisation energy as you go down group 2?
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Decreases
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What happens to the first ionisation energy in periods?
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The first ionisation energy increases as you go across each period from left to right, then abruptly decreases at the start of the next period
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what is ionisation energy measured in?
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kJ mol-1
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