Question

Take the triad consisting of lithium (Li) sodium(Na) snd potassium (K) with the respective atomic masses 6.9,23.0and 39.0.What is the average of atomic masses of Li and K? How does this compare with the atomic mass of sodium (Na)

Answer 1

Answer:

First The Traid of atomic masses that is given :

Therefore, by law of Doberniers traid:

(K)= 39.0

(Na)=23.0

(Li)=6.9

Now the average of extreme digits:

K+Li=

39.0+6.9= 46

Dividing 46 by 2

that is 23

Now,

Atomic mass of Sodium (Na) is 23.0

Therefore the average of first and last element is equal to atomic mass of middle element Sodium (Na).

Now,

Hence it is a Doberniers traid....

Explanation:

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