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Gold has held an [enduring / daring] allure for thousands of years. This precious metal has remained a [symbolic / symbol] of elegance and [wealth / wealthy] . Scientists have discovered how it stays in such pristine condition and never loses [their / its] shine. Researchers from Tulane University in New Orleans found that gold does not [lust / rust] or change colour because of the structure [of / at] atoms on its surface. Dr Matthew Montemore wrote that the atoms naturally rearrange [itself / themselves] into unique zigzag patterns that [minimal / minimize] chemical reactions with oxygen. He said: "This makes the gold much more resistant [to / for] oxidation." As a result, it does not become discoloured, even after centuries of exposure [at / to] the elements.

A low level [at / of] reactivity to oxygen is called chemical nobility. Gold is the most noble of [every / all] metals. Its resistance to bonding with oxygen means [it / that] maintains its shininess for thousands of years. It is also one of the most [malleable / able] metals, which means it can easily be hammered into thin sheets. Gold can be beaten [to / of] a thickness of less than 0.1 micrometres — a hundred times thinner than a [humane / human] hair. Its pure form is why humans have used gold for jewellery and [currents / currency] for more than 5,000 years. It also has important [issues / uses] in electronics, dentistry, spacecraft technology, and [medicine / medicinal] . The researchers believe it will continue to be integral [in / on] industrial applications.