When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called a(n):

• A. dicarbon monoxide
• B. carbon dioxide
• C. carbonic acid
• D. carbon monoxide

Answer: (B)

Verified step by step guidance

1. Identify the chemical formula formed when 1 carbon atom combines with 2 oxygen atoms. This corresponds to the formula \(\mathrm{CO_2}\).
2. Recall the common names of compounds formed by carbon and oxygen atoms: \(\mathrm{CO}\) is carbon monoxide, \(\mathrm{CO_2}\) is carbon dioxide, and carbonic acid is \(\mathrm{H_2CO_3}\), which includes hydrogen atoms as well.
3. Understand that the name 'dicarbon monoxide' would imply 2 carbon atoms and 1 oxygen atom, which does not match the given combination.
4. Recognize that the compound with 1 carbon and 2 oxygen atoms is called carbon dioxide, based on standard chemical nomenclature.
5. Conclude that the correct name for the substance formed by 1 carbon atom and 2 oxygen atoms is carbon dioxide.