Name the alkyne. Spelling and punctuation count.

The name of a compound is determined by IUPAC nomenclature

The International Union of Pure and Applied Chemistry have designated a universal rule for the nomenclature of organic compounds generally known as IUPAC nomenclature.

The whole idea of the IUPAC nomenclature is to have a universally agreed pattern of naming organic compounds according to their structure.

The compound is always named in such a way that the substituents and the functional group receives the lowest number.

In this case, the functional group is alkyne hence the name of the compound ends in -yne. The methyl group is substituted on position four.

Putting all these together the compound should be named as;  4-methylhept-2-yne

For IUPAC nomenclature of an inorganic compound see:

i have no clue hope you find the answer

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).