Question

Cl, Br, I, if this is Dobereiner’s triad and the atomic
masses of Cl and I are 35.5 and 127 respectively
the atomic mass of Br is –
(a) 162.5 (b) 91.5
(c) 81.25 (d) 45.625

Answer 1

Answer:

options (c) 81.25

Explanation:

when you add cl and l /2

therefore 3.5 + 127 = 162.5/ 2 = 81.25

Answer 2

Answer:

Atomic mass of Chlorine= 35.5

Atomic mass of Iodine = 127

Atomic mass of Bromine = ?

$\frac{35.5 + 127}{2} = 81.25$

Therefore, atomic mass of Bromine

is 81.25

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