In the alkane $CH_3-CH_2-C(CH_3)_2-CH_2-CH(CH_3)_2$,identify $1^{\circ}$,$2^{\circ}$,and $3^{\circ}$ carbon atoms and give the number of $H$ atoms bonded to each one of these.

(N/A) $1^{\circ}$ carbon atoms are bonded to only one other carbon atom. In the given structure,there are five $1^{\circ}$ carbon atoms (the terminal methyl groups),which are bonded to a total of $15 \ H$ atoms.
$2^{\circ}$ carbon atoms are bonded to two other carbon atoms. In the given structure,there are two $2^{\circ}$ carbon atoms (the methylene groups $-CH_2-$),which are bonded to a total of $4 \ H$ atoms.
$3^{\circ}$ carbon atoms are bonded to three other carbon atoms. In the given structure,there is one $3^{\circ}$ carbon atom (the methine group $-CH-$),which is bonded to $1 \ H$ atom.