Question

Find the mass number of chlorine and argon by using mass formula? ​

Answer 1

Answer:

the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

Answer 2

Answer:

Average atomic mass of chlorine = (0.7577

⋅

35 amu) + (0.2423

⋅

37 amu) = 35.48 amu

argon : 39.948 u