Is CO2 a compound, molecule, or atoms/elements?

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

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