Question : What is the number of hydrogen atoms in a molecule of calcium bicarbonate?
Option 1: 0
Option 2: 1
Option 3: 2
Option 4: 4
Correct Answer: 2
Solution : The correct answer is 2.
Another name for calcium bicarbonate is calcium hydrogen carbonate. The chemical formula for it is Ca(HCO 3 ) 2 . It is clear from the preceding formula that calcium bicarbonate has two hydrogen atoms.