its the molecule HOCl
H has 1 valence electron
O has 6 valence electrons
Cl has 7 valence electrons
Oxygen shares 1 electron with H to form O-H bond and another electron with Cl to form O-Cl bond.
Thus Oxygen would be left with two lone pairs of electron on it, While Cl would be left with 3 pairs of electrons.
So the final structure would be .. ..
H - O - Cl :
The dots over O and Cl shows the lone pair of electrons.