There are only six ________ denser than gold are: osmium, iridium, platinum, rhenium, neptunium and plutonium.
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special difficulty
Gold can be beaten without any ________ to a thickness of 0.1 micron (0.1 μm)
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Gold
________ is the most malleable of all metals: it can be beaten into thinner sheets than any other metal.
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Ernest Rutherford
________ and his coworkers Hans Geiger and Ernest Marsden fired alpha particles (nuclei of helium) at gold leaf.
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Gold
________ does NOT dissolve in nitric acid, so if a metal reacts with nitric acid, it is certainly NOT ________.
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Gold
________ is the most ductile of all metals: it is the most suitable for drawing into wires.
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Gold is the most malleable of all metals
it can be beaten into thinner sheets than any other metal
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Gold is the most ductile of all metals
it is the most suitable for drawing into wires
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There are only six metals denser than gold are
osmium, iridium, platinum, rhenium, neptunium and plutonium
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‘The acid test
a test whose result is absolutely certain
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Gold Foil Experiment
The experiment found that alpha particles were deflected as they passed through the gold more than they ought to have been if the gold atoms were made of smoothly spread matter.
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By 1911 Rutherford had concluded that
atoms consist of a tiny, dense point of positive charge surrounded mostly by empty space in which negatively charged electrons are present.
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Approximately 75 percent of the world’s gold
ends up in jewelry.
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Gold does NOT dissolve in
nitric acid, so if a metal reacts with nitric acid, it is certainly NOT gold.
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The ‘acid test’ became popular in the
1849 Californian gold rush, when all sorts of characters tried their hand at selling fake gold.
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Ernest Rutherford and his coworkers Hans Geiger and Ernest Marsden
fired alpha particles (nuclei of helium) at gold leaf.
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Flashcard (110)