How is hydrogen in heavy water different from hydrogen in normal water? A. The hydrogen atoms in heavy water have an extra proton in the
nucleus.
B. The hydrogen in heavy water is radioactive.
C. The heavy water molecules contain 3 hydrogen atoms instead of
2.
D. The hydrogen atoms in heavy water have a neutron in the nucleus,
doubling the mass.

thats how its supposed to be

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.

the answer is a for sure mark brainliest i had got this right on usatestprep