77. Identify the following as element or compound.
Au

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Solution

The element is a pure substance that cannot be broken into other simpler substances. Element is made up of a single kind of atom.
A compound is a pure substance that is made up of chemical combinations of two or more elements in a fixed ratio.
Since, Au (Gold) is made up of a single kind of atom. So, according to the definition of 'element', Auis an element.

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