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Atomic Mass and Atomic Mass Unit

Which scienti...

Question

Which scientist stated that the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements?

A

Dobereiner

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B

Mendeleev

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C

William Prout

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D

Newland

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Solution

The correct option is A
Dobereiner

Dobereiner stated that the atomic mass of the middle element was roughly the average of the atomic mass of the other two elements.

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Similar questions

Q. According to Dobereiner's theory of triads, the mass of middle element was roughly the average of atomic masses of other two elements.

Q. In Dobereiner's triads, when three elements in a triad are written in the increasing order of atomic masses; the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements. Identify ‘X’ from the given triad.
Li (6.9), Na (X), K (39.0).

On the basis of Mendeleev's Periodic Table given below, answer the question that follow the table:

Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his Periodic Table? Using atomic masses of

Li,NaLi,Na, find the average atomic mass of and compare it with the atomic mass of. State the conclusion drawn from this activity.

Q. Statement: In Dobernier's classification of elements, the atomic mass of the middle element is equal to the average atomic masses of the extreme elements of a triad.

State whether the given statement is true or false.

Q. Assertion :According to Dobernier's, a group of three similar elements arranged in their increasing atomic weights show that atomic weight of middle is equal to the arithmetic mean of the other two elements. Reason: Atomic weight is equal to one twelfth of mass of a carbon atom.

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