The imagine below shows an atom arrangement.
Why is it considered a mixture?

a) it’s composed of 1 kind of atom
b) it’s a physical combination of two or more different substances
c) it’s composed of 2 or more types of elements that are chemically combined.

The imagine below shows an atom arrangement Why is it considered a mixture a its composed of 1 kind of atom b its a physical combination of two or more differen class=