Question 13

Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately

(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

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Solution

Option c is the correct answer.

The fractional atomic mass (35.5) of chlorine is due to the fact that in ordinary chlorine atom, Cl - 37 and Cl - 35 is approximately

$∴$ Average atomic mass of $C l = \frac{3 \times 35 + 1 \times 37}{4} = 35.5 a m u$

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Question 13 Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately (a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

Option c is the correct answer. The fractional atomic mass (35.5) of chlorine is due to the fact that in ordinary chlorine atom, Cl - 37 and Cl - 35 is approximately ∴ Average atomic mass of Cl=3×35+1×374=35.5 amu

Question 13

Chlorine exists in two isotopic forms. Cl - 37 and Cl - 35 but its atomic mass is 35.5. This indicates the ratio of Cl - 37 and Cl - 35 is approximately

(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) 3 : 1

Option c is the correct answer.

The fractional atomic mass (35.5) of chlorine is due to the fact that in ordinary chlorine atom, Cl - 37 and Cl - 35 is approximately

$∴$ Average atomic mass of $C l = \frac{3 \times 35 + 1 \times 37}{4} = 35.5 a m u$