Question

Explain doberiener triad ​

Answer 1

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.

Answer 2

❣️​Hola mate,

♡​Here is your answer.. :)♡

(｡◕‿◕｡)❤

In 1829, Johann Dobereiner recognized triads of elements with chemically similar properties.

Example: In the triad of lithium, sodium and potassium.

Explanation:

According to Dobereiner, all elements occurred in groups of three, when arranged in increasing order of atomic masses. He referred to these groups as triads. In a traid the elements had similar chemical properties.  

Traids of the Dobereiners classification:

                   Traid1:

Element                    Atomic mass

Lithium (Li)                               7

Sodium (Na)                             23

Potassium (K)                          39

                   Traid2:  

Element                    Atomic mass

Chlorine (Cl)                            35.5

Bromine (Br)                            80

Iodine (I)                                    127

                   Traid3:  

Element                    Atomic mass

Calcium (Ca)                             40

Strontium (Sr)                           88

Barium (Ba)                              137

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.