How many atoms of Ga are there?

There are 2 Ga and 2 N atoms in a unit cell of wurtizite GaN as per its crystal structure

Explanation:

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl