Chlorine, which exists in nature in two isotopic forms, has an atomic mass of 35.45 amu. This means that?

Question

1. all chlorine atoms have a mass of 35.45 amu.
2. some, but not all, chlorine atoms have a mass of 35.45 amu
3. 35.45 amu is the upper limit for the mass of a chlorine atom
4. more than one of the above answers are correct
5. none of the above answers are correct

Answer 1

5. None of the above.

The answer is that about 75% of Cl in nature is Cl-35, and 25% is Cl-37, resulting in an average of 35.45.

Answer 2

The AMU is calculated via including the atomic a tremendous number of all isotopes, and their relative proportions. Cl-35 weighs 35 AMU and Cl-37 weighs 37 AMU. because of the fact the given AMU is nearer to twenty-5 than that's to 37, you realize Cl-35 is plenty greater person-friendly.

Answer 3

The weighted average of the isotopes in nature is 35.45 amu. In other words Mass of Iso1 * fraction in nature + Mass of Iso2 * fraction found in nature = 35.45 amu.

Answer 4

5. none of the answer are correct.

Chlorine exists as two stable isotopes Chlorine 35 (18 neutrons) and Chlorine 37 (20 neutrons). The molecular weight is an average of the molecular weights of these species times their isotopic abundance.

ref: http://en.wikipedia.org/wiki/Chlorine

Answer 5

35.45amu is the upper limit for the mass of a chlorine atom