3 years ago

A sample of matter must be copper if(1) each atom in the sample has 29 protons

1 answer:

3 0

The answer is 1. Copper is an element with sign Cu and atomic number 29 which means that there are 29 protons in this element. It is a soft, flexible, and elastic metal with very extraordinary thermal and electrical conductivity. A newly unprotected exterior of pure copper has a reddish-orange color.

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