The elements in this ROW of the periodic table belong to the same? *

Period

Explanation:

The name of the rows in the periodic table being period.

A column would be called a group/family.

period because it's in a row. A group is a column  

it is called acid bonding

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.