Which of the following is the best description of an element? a
A material that has a specific shape at a specific temperature
b
A pair of atoms that have different abilities when joined together
c
A substance that cannot be broken down into simpler substances
d
A naturally occurring mineral made of more than one substance

c . A substance that cannot be broken down into simpler substances

Explanation:

The best description of an element is that it is a substance that cannot be broken down into simpler substances.

An element is a pure substance but it is the simplest unit by which chemical reactions can take place.

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explanation:

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the temperature of the gas, in k, not celsius.