Provide the systematic names for the following compounds: CH2=C(CH3)CH3, CH3CH2CH2C≡CH, CH3CH2CH2CH2CH2CH3.

This chain has 3 carbons.

The double bond is between C1 and C2.

There is a methyl group ($\text{CH}_3$) on C2.

The parent alkene is propene, and the methyl group is at position 2.
Systematic name: $\boxed{\text{2-methylprop-1-ene}}$ (or 2-methylpropene)

This chain has 5 carbons.

The triple bond is between C1 and C2.

It is an alkyne.

The parent alkyne is pentyne, and the triple bond is at position 1.
Systematic name: $\boxed{\text{pent-1-yne}}$

This chain has 6 carbons.

It is an alkane (all single bonds).

A 6-carbon alkane is hexane.
Systematic name: $\boxed{\text{hexane}}$