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Mendeleev's Periodic Law

The physical ...

Question

The physical and chemical properties of elements are the periodic function of their atomic numbers. This was stated by :

A

Mendeleev

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B

Lothar Meyer

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C

Moseley

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D

Bohr

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Solution

The correct option is C Moseley
Moseley discovered the atomic numbers from X-ray spectra of elements by bombarding the elements with cathode rays and the elements emitted respective X-rays of characteristic frequency.

The atomic number has provided a better basis for the periodic arrangement of the elements.

Modern periodic law :

Physical and chemical properties of the elements are periodic functions of their atomic numbers and electronic configuration.

Hence, the correct option is $C$

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__ law states that the physical and chemical properties of elements are periodic function of their atomic numbers.

Q. According to Mendeleev's Periodic Law, "The physical and chemical properties of elements are the periodic function of their atomic ".

Q. Select the correct alternative from the statements that are not related to Mendeleev's periodic table.

(a) The physical and chemical properties of elements are the periodic function of their atomic number.

(b) The elements with higher atomic weight were placed before elements with lower atomic weights.

(c) The physical and chemical properties of elements are the periodic function of their atomic weights.

(d) The atomic number has been established as the fundamental characteristic of elements based on the work on x-ray spectra of elements.

Q. According to Moseley's periodic law the physical and chemical properties of elements are the periodic function of their atomic .

Q. Arrange the following statements in a chronological order.
(a) Some elements be grouped in set of three elements in the increasing order of their atomic weights in which the atomic weight of the middle element was found to be the arithmetic mean of the atomic weights of the other two elements.
(b) The physical and chemical properties of elements are periodic functions of their atomic numbers.
(c) The physical and chemical properties of elements are periodic functions of their atomic weights.
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