For the relative mass yes.
The atomic mass is different. You asked me what it stated for the atomic mass.
“The atomic mass of CL 35 is 35.453 as a result of CL 35 having 17 protons and 18 neutrons”
“CL 35 the 35 means that it has 17 protons and 18 neutrons. Why isnt this 35.000 instead of 35.453? Because the mass of the neutron is the combined mass of a proton plus an electron. Thats where you get the extra bit on.”