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Example: Choose the name for CH3CH2CH2CH3

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Example: Butane

The longest chain or parent chain has 4 carbon atoms (prefix: 'but'), since there are no substituents (groups appending from the parent chain) and it is not cyclic (or a ring) it is an alkane (suffix: 'ane') and therefore called butane. -- The explanation can assist you in understanding the question and answer.

See Wikipedia article on IUPAC nomenclature of organic chemistry for more information. -- The Wikipedia link can assist you in understanding the question and answer if you need help. Sometimes it is hard to understand, but you could also generally look up the concept and get on-line help.

Question ID: 2 - this question is answered correctly 48% of the time. -- The question ID and the percent of time this question is answered correctly by everyone will be shown here. The question ID can be used to reference the question, while the percent of the time it is answered correctly is a fun way to compare yourself to others.

Category: Nomenclature -- The question category will be identified here, select the categories you want to study below, this allows for focused study. Available categories include functional groups, nomenclature, fundamental concepts, and types of reactions. Below this is the results table, a way to track and compare your results with everyone who uses the page to study organic chemistry.