Question

explain - relative atomic mass of chlorine is 35.5 amu

Answer 1

That means that the total mass of achlorine atom is about 35.5 atomic mass units. Chlorine has 17 protons in its nucleus and its most common isotope has 18 neutrons. Both protons and neutrons weigh exactly 1 atomic mass unit, meaning that the sum ofweight of all the subatomic particles in its nucleus is of 35amu.

Answer 2

Answer:

Atomic mass is the ratio of the mass of the average of all isotopes of an element. Chlorine exists in the form of 2 isotopes, 1735Cl and 1737Cl. Approximately 1 atom out of every four is of 1737Cl

hence the relative atomic mass = 35.5

Chlorine exists in nature as (Cl2) Thus, 2 atoms of chlorine shared one electron each from the outermost shell of their orbits and form (Cl2) molecule. Thus, atomicity of chlorine is 2.