Drawing the condensed structure of ethylcyclobutane The IUPAC name for this is ethylcyclobutane. I know that the formula is $\ce{C6H12}$.

I have no problems drawing the skeletal structure, but I have a little difficulty drawing the condensed structure. I know this is basic, but I just started learning how to name them.

I tried it below. For $\ce{CHCH2CH3}$, am I right to write it in a straight chain?
$\ce{CH3CH2CH(CH2)3}$ is the best you can do.

If you want to draw the cycle, then you should make it pendant, drwing a bond from the ring to the ethyl group.