Some chlorine atoms have an atomic mass of 37, while others have an
the atomic mass of 35.the difference between the two types of chlorine
atom is The number of neutrons, therefore the correct answer is option C
The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside of any atom.
Since there are chlorine atoms with an atomic mass of 37 and those with an atomic mass of 35. Option C is the appropriate response because the number of neutrons distinguishes between the two varieties of chlorine atoms.
Learn more about the atomic number from here
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