Karteikarten
Relative Mass
Karten in diesem Stapel (9)
- 1Relative Molecular MassThe weighted mean mass of a molecule relative to the mass of 1/12th an atom of carbon-12
- 2Relative Atomic MassThe weighted mean mass of an atom of an element compared to 1/12th the mass of an atom of carbon-12
- 3Relative Formula MassThe weighted mean mass of a formula unit relative to 1/12th the mass of an atom of carbon-12
- 4Relative Isotopic MassThe mass of an isotope relative to 1/12th the mass of an atom of Carbon-12
- 5Fill in the blanks: The percentage _______ of the isotopes in a sample of an ________ can be found __________ using a mass __________.The percentage ABUNDANCES of theisotopes in a sample of an ELEMENT can be found EXPERIMENTALLY using a mass spectrometre.
- 6After the sample of the element has been placed in the mass spectrometre, what happens to it?It is vaporized and ionised to form a gas of positive ions
- 7After vaporization, how are the ions of the different isotopes in an element separated?The ions are accelerated. The heavier ions move slower and are therefore harder to deflect than lighter ions, this means the ions of each isotope are separated
- 8The ions are detected on a mass spectrum as a mass to charge ratio, this produces a signal, what determines how large the signal is?Each ion reaching the detector adds to the signal, so the greater the abundance, the greater the signal.
- 9Relative Atomic mass can be worked out using isotopic abundances (as percentages) how do you carry out this calculation?You times the Atomic mass of each isotope of the element by its isotopic abundance. Then you add up all the results and divide them all by 100.
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- The mind map that these flashcards are based on can be found on my account of here: https://www.goconqr.com/en-GB/p/5001771
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- Bee Brittain
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