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A low
of reactivity to oxygen is called chemical nobility. Gold is the most
of all metals. Its resistance to bonding with
means it maintains its
for thousands of years. It is also one of the most malleable metals, which means it can easily be hammered into thin
. Gold can be beaten to a
of less than 0.1 micrometres — a hundred times thinner than a human
. Its pure form is why humans have used gold for jewellery and
for more than 5,000 years. It also has important uses in
, dentistry, spacecraft technology, and medicine. The researchers believe it will continue to be
in industrial applications.
