The elements Hydrogen (H) and Chlorine (CI) combine together to form HCI (Hydrochloric Acid). Here is the information for each of these elements:

Hydrogen (H): Atomic number: 1; Atomic mass: 1.008
Chlorine (CI): Atomic number: 17; Atomic mass: 35.453

Check all that apply to the bonding of Hydrogen and
Chlorine:

Covalent
Double Bond
Single Bond
lonic
Triple Bond