No, carbon dioxide is not a chemical element; it is a chemical compound.
Carbon dioxide (CO2) consists of one carbon atom and two oxygen atoms bonded together. In contrast, a chemical element is a substance that cannot be broken down into simpler substances by chemical means, and each element has its own unique properties. Elements are represented on the periodic table, while compounds like carbon dioxide are formed when two or more different elements combine chemically.
To summarize, while carbon, which is a part of carbon dioxide, is a chemical element (found in group 14 of the periodic table), carbon dioxide itself is a compound made up of carbon and oxygen elements.