structural isomers of butane?

Butane, which has the chemical formula C4H10, has two structural isomers:

1. n-Butane: This is the straight-chain form of butane, where all four carbon atoms are in a row.

2. Isobutane (or 2-methylpropane): In this isomer, three of the carbon atoms are in a row, and the fourth is connected to the middle carbon of the three.

Here's a simple way to visualize them:

n-Butane:

H  H  H  H
|  |  |  |

H - C -C -C -C - H | | | | H H H H

Isobutane:

    H
    |
H - C - H
|

H - C - C - H | | H H | H

In both cases, each carbon atom is bonded to as many hydrogen atoms as possible, up to a maximum of four. This is because carbon forms four bonds in stable compounds.