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Chlorine occurs in nature in the form of...

Chlorine occurs in nature in the form of two isotopes with atomic mass 35 and 37 in the ratio of 3 : 1 respectively. The average atomic mass of chlorine is

A

38.5

B

35.5

C

36

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
35.5
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Knowledge Check

  • The mass of an atom is due to the masses of protons and neutrons in the nucleus. The relative masses of protons and neutrons are almost equal to one. Therefore, the atomic mass of an element should be nearly a whole number. But in many cases the atomic masses are fractional. The main reason for these fractional atomic masses is that these elements occur in nature as a mixture of several isotopes. The atomic mass of an element is the average of the atomic masses of these isotopes in the ratio of their proportion of occurrence. Chlorine occurs in nature in the form of two isotopes with atomic masses 35 u and 37 u in the ratio of 3 : 1 respectively. Atomic mass of chlorine is

    A
    35.5 u
    B
    34.5 u
    C
    35 u
    D
    36 u

  • Chlorine occurs in the form of the following isotopes.

    A
    Cl-35 and Cl-36
    B
    Cl-35 and Cl-37
    C
    Cl-34 and Cl-35
    D
    Cl-37 and Cl-39

  • The relative abundance of two isotopes of atomic masses 85 and 87 are 75% and 25% respectively. The average atomic mass of element is:

    A
    86
    B
    40
    C
    85.5
    D
    75.5

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    The isotopes of chlorine with mass numbers 35 and 37 exist in the ratio of

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