ITS B. FASHO that’s what I’m think
chlorobenzene
Carbon - 6
Hydrogen - 5
Chlorine - 1
that 1 chlorine replaces one of the hydrogens
thats why hydrogen number decreases by number of Cl atoms (that are substituting those H atoms)
Atoms with the same number of protons, but different numbers of neutrons are isotopes of the same element.
Answer:
you are not posted question