Name the following compound:
2-methyl-1-butyne
2-ethyl-1-propyne
1-dimethyl-1-propyne
2-methyl-1-butene

2-methyl-1-butyne. In fact, the IUPAC rules for naming different homologous series is to put the number that indicates the functional group of the series like this: 2-methylbut-1-yne.

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.