Flashcards
Atoms, Ions & Compounds
Cards in this deck (23)
- 1isotopesatoms of the same element with the same amount of protons or electrons BUT different number of neutrons
-so diff mass number - 2atomic (proton) numbernumber of protons in nucleus of an atom
- 3relative isotopic mass RIMmass of an atom of an isotop comapred to 1/12th mass of 1 atom of carbon-12
- 4relative atomic mass, Ar, RAMweighted mean mass of an atom of an element compared to 1/12th mass of carbon-12
- 5explain why we say "weighted mean mass"most elements mix of isotopes so wmm accounts for % abundance of each isotope & relative isotopic mass of isotope
- 6relative molecular mass, Mrweighted mean mass of a molecule of a compound comared with 1/12th mass of an atom of carbon 12
- 7relative formula massweighted mean mass of the formula unit of an element compared to 1/12th mass of 1 atom of carbon-12
- 8use of mass spectroscopy-determine relative isotopic masses ?
- determine relative abundances of the isotope
- relative isotopic mass from relative abundances of its isotopes - 9use of mass spectrometry to work out RAMso it works out% abundance of each isotope in sample of element
-place sample in mass spec
-vaporise then ionise sample: form +ions
-ions accelerated
-heavier ions lsower & harder to deflect
-so ions separated
-detected as m/z ratio - 10calculating RAM method(% x mass) + (% x mass) / 100
- 11polyatomic ionsions that contain more than 1 element bonded together
- 12nitrate ionNO3-
- 13hydroxide ionOH-
- 14hydrogencarbonate ionHCO£-
- 15manganate VII ion (permanganate ion)MnO4-
- 16carbonate ionCO3 2-
- 17sulfate ionSO4 2-
- 18sulfite ionSO3 2-
- 19dichromate VI ionCr2 O7 2-
- 20Phosphate ionPO4 3-
- 21ammonium ionNH4+
- 22silver ionAg +
- 23Zinc ionZn 2+
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- A level Chemistry Flashcards on Atoms, Ions & Compounds, created by Mehak Zahrah Faheem on 13/04/2021.
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- Mehak Zahrah Faheem
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