Question

which of the following is a doberiner's train
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Answer 1

Explanation:

Dobereiner law of triads states that the average of the atomic masses of the first and third element in a triad will be roughly equal to the atomic mass of the second element in that triad. ... Three more triads were determined in the year 1829. For example: The atomic mass of calcium is 40g/mol. make me brainlist and like this answer follow me