Question

Identify Dobereiner's triads from the following
2. S (32.1), Se (79.0), Te (127 tim
2.1 Dobereiner's Triads
Can you tell?
elements having similar chemical properties.
1. Mg (24.3), Ca (40.1), Sr (87.6)
3. Be (9.0), Mg (24.3), Ca (40.1)
in
el
ра
16. please answer ​

Answer 1

Explanation:

Dobereiner said that If there are 3 elements

A B and C which are in a group ..

The average of masses of A and C equals B

For (1)

Mg (24.3), Ca (40.1), Sr (87.6)

A+C/2 should be B

let's verify..

(24.3 + 87.6 )/2 = 111.9/2 = 55.45 to be approx which is not equal to Ca's mass which is 40.1

so (1) does not follows dobereiner's traid...

Now for (2)

Be (9.0), Mg (24.3), Ca (40.1)

(A+C)/2 should be B

(9 + 40..1)/2 = 49.1/2 = 24.3 to be approx

So we verified that A + C/2 = B

and

therefore

(2) follows dobereiner's traid