United-atom model

In the united-atom model the Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle CH_2} and Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle CH_{3}} units are treated as one point, i.e. the hydrogen atoms are incorporated within the carbon atoms and are not expressed explicitly.