John Dobereiner proposed the idea of similarity in the properties of elements which can be placed together.
He proposed the idea of classification so that we can study the properties of a group of elements together
According to him, three elements can be grouped based on their similarities in properties. This group of three elements was termed as "Triads"
For example :
Li, Na, K
Now the significance of the triad was that the atomic weight of middle element is average of atomic weights of the side atoms
So atomic weight of Na = 23 is average of atomic weights of Lithium and Potassium
7 + 39/2 = 46/2= 23
The other triads were
Ca Sr Ba
Cl Br I
S Se Te
They have began to grow apart, as their lives are changing and as they are growing older, they are growing further apart.
I would say the answer is B - Differentiating
<span>Ans- bond with the highest bond energy is for ( C=C \rightarrow 620 (kJ/mol)
N=N \rightarrow 418 (kJ/mol)
Si=O \rightarrow 452 (kJ/mol)
O=O \rightarrow 498.7 (kJ/mol)
C=N \rightarrow 615 (kJ/mol)
C=C \rightarrow 620 (kJ/mol)</span>
Answer:
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Explanation:
Normally, in the neutralization reactions, that is how the reactions between and acid and a base are called, you assume additive volumes.
Additive volumes means that the <em>volume</em> of the final <em>solution</em> is equal to the sum of the separate volumes of the two solutions that are mixed.
It is not totally accurate, but it is a good approximation and for lack of additional data it is what is used.
Then, assuming additive volumes:
- Total volume of the solution = 100 mL + 250 mL = 350 mL.
Picture?For the following equation so I can solve it for a better assistance please and thank you you
