Question

Why was the system of Chlorine, bromine and iodine form a Dobereiner's triad. The atomic masses of chlorine and iodine are 35.5 and 126.9 respectively. Predict the atomic mass of bromine. Lithium, sodium and potassium from a Dobereiner's triad. The atomic masses of lithium and​

Answer 1

Answer:

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Answer 2

Answer:

Explanation:

Dobereiner's triads- It states that the atomic mass of middle element in doberiener's triad is exactly or nearly the arithmetic mean of the atomic masses of other two elements.

∴AtomicmassofBromine=  

2

(Atomicmassofchlorine)+(AtomicmassofIodine)

​

 

⟹ Atomic mass of Bromine =  

2

35.5+126.9

​

 

⟹ Atomic mass of Bromine =81.2