Question

State Dobereiner's law of triads giving one example.

Answer 1

$\Large\underline{\underline{♡\mathcal{\red{A}\green{n}\pink{s}\orange{w}\blue{e}\red{r}}}}♡$

Dobereiner's law of triads states that, the atomic mass of the middle element of a triad is the arithmetic mean of the atomic masses of the other two elements.

• Example:In the triad of lithium, sodium and potassium.The atomic mass of lithium is 7 and  the atomic mass of potassium is 39. The average of masses of lithium and potassium gives atomic mass of sodium 23.  Drawbacks: All the known elements could not be arranged in the form of triads. This law did not hold good for elements with very low or very high atomic mass.  Example: The arithmetic mean of the atomic masses of fluorine 19 and bromine 80, which comes to 49.5, varies significantly from the atomic mass of chlorine, which is 35.5.

$<marquee behavior="alternate" direction="left">❣️☺Hope it Helps uh❣️☺</marquee></p><p></body>$

$<marquee>❣️☺Follow me Nd mark my answer as Brainliest❣️☺</marquee></p><p></body>$

$<a href="https://brainly.in/question/16121207">Read more on Brainly ? Click Here</a>$,

Answer 2

Answer:

Li,Na,K

Explanation:

Atomic mass,

Li=6.9

K=39.1

Na=6.9+39.1÷2

Na=46÷2

Na=23

Therefore,

Li,Na,K is a dobernier triad