Which German chemist was the first to show a graphical representation of the periodicity of an atomic volume plotted against atomic weight? [SICPO Paper I 2023]

Who conducted X-ray spectroscopic study of a large number of elements and showed that the frequency of X-rays emitted by an element is related to the atomic number, Z, rather than the atomic mass? [Combined Graduate Level Examination Tier I 2022]

How many elements are listed in the modern periodic table? [MTS Non Tech Havaldar CBIC and CBN Examination 2023]

Identify the correct statement about Newlands’ law of octaves. [Combined Graduate Level Examination Tier I 2023]

The Modern Periodic Law was given by ________________. [Constable GD Examination 2022]

Which of the following scientists grouped the elements into triads? [SICPO Paper I 2024]

In which musical note did Newland put the metals Co and Ni with halogens? [Combined Graduate Level Examination Tier I]

How many elements were known when Mendeleev started his work? [Constable GD Examination 2022]

Which of the following scientists provided the Law of Octaves? [SICPO Paper I 2023]

What is the total number of periods and groups in the Modern Periodic Table? [MTS Non technical and Havaldar Examination 2021]

In Which year did John Newlands propound the ‘Law of Octaves' an innovative concept proposing the periodicity of chemical elements arranged in the order of atomic weight? [Combined Graduate Level Examination Tier I 2023]

When did Dmitri Mendeleev invent the periodic table, ordering the symbols of the chemical elements according to their atomic weights? [Combined Graduate Level Examination Tier I 2023]

In which year did AEB de Chancourtois organise the elements by atomic weight, by graphing the elements around a cylinder with a circumference of 16 units, corresponding to the weight of oxygen (O)? [Combined Graduate Level Examination Tier I 2022]

In 1887, the Royal Society, London gave the Davy Medal for the ‘discovery of the periodic law of chemical elements’ to ____________. [Combined Graduate Level Examination Tier I 2022]

In which year did Dmitri Mendeleev and Lothar Meyer individually come up with their own periodic law and proposed that on arranging elements in the increasing order of their atomic weights, similarities appear in physical and chemical properties at regular intervals? [CHSL 2021 Tier I]

Who arranged the elements with chemically similar properties, such as lithium, sodium, and potassium, and showed that the properties of the middle element could be predicted from the properties of the other two? [CHSL 2021 Tier I]

Which law was based on notes of the music? [Combined Graduate Level Examination Tier I 2022]

In which musical note did Newland put the metals Co and Ni with halogens ?

[SSC CGL 2024]

Name the chemist who proved that the atomic number of an element is a more fundamental property than its atomic mass, which led to modification in Mendeleev’s Periodic Law table?

[RRB NTPC CBT]

Elements in the modern periodic table are arranged in ________ vertical columns.

[RRB NTPC CBT]

When did Dmitri Mendeleev invent the periodic table, ordering the symbols of the chemical elements according to their atomic weights?

[SSC CGL 2023]

In 1887, the Royal Society, London gave the Davy Medal for the ‘discovery of the periodic law of chemical elements’ to ____________.

[SSC CGL 2022]

How many elements were known when Mendeleev started his work?

[SSC GD 2022]

Who discovered three chemical elements: cerium, thorium and selenium, and devised the modern method by which one or two letters are used to symbolize elements?

[SSC CGL 2022]

Which law was based on notes of the music?

[SSC CGL 2022]

Which German chemist was the first to show a graphical representation of the periodicity of an atomic volume plotted against atomic weight?

[SSC CPO 2023]

9. In which year did AEB de Chancourtois organise the elements by atomic weight, by graphing the elements around a cylinder with a circumference of 16 units, corresponding to the weight of oxygen (O)?

[SSC CGL 2022]

In which year did John Alexander Newlands propound a new concept of the ‘Law of Octaves' proposing the periodicity of chemical elements arranged in order of atomic weight?

[SSC CHSL 2023]

Moseley obser v ed that the plot of v against atomic number (Z) gave a straight line. What does v indicate here ?

[SSC MTS 2024]

The number of elements known at the time of Russian chemist Dmitri Ivanovich Mendeleev was:

[SSC CHSL 2023]

What was the symbol Henry Moseley used for denoting atomic number?

[RRB NTPC CBT]

In Newlands’ Octaves, the properties of lithium and ________ were found to be the same.

[SSC CGL 2024]

Name the German Chemist who grouped elements into triads in 1817?

[RRB NTPC CBT]

Which of the following statement is 'true' for 'dobereiner's triads"?
I. Triads were in order of atomic masses.
II. Atomic mass of middle element was roughly the average of atomic masses of other two elements.

[SSC GD 2024]

The Modern Periodic Table is based on _____ of the elements.

[RRB NTPC CBT]

Which scientist invented the Periodic table?

[RRB NTPC CBT]

In Which year did John Newlands propound the 'Law of Octaves' , an innovative concept proposing the periodicity of chemical elements arranged in the order of atomic weight?

[SSC CGL 2023]

How many horizontal rows are present in the modern periodic table?

[SSC GD 2024]

Elements in the Modern Periodic Table are arranged in _____ vertical columns called groups and ______ horizontal rows called periods.

[SSC GD 2024]

In 1866, John Newlands, an English scientist, arranged the then known elements in the order of _________ . It is known as 'Newlands' Law of Octaves'.

[SSC GD 2024]

The Modern Periodic Law was given by ________________.

[SSC GD 2022]

Who discovered the atomic number based on X-ray wavelength in 1913 ?

[SSC CHSL 2024]

Identify the correct statement about Newlands' law of octaves.

[SSC CGL 2023]

Mendeleev's periodic table was changed, and _____ was accepted as the basis of the modern periodic table

[SSC GD 2024]

How many triads were mentioned in Dobereiner's Triads?

[SSC GD 2024]

When Mendeleev started his work, how many elements were known at that time?

[SSC GD 2024]

Who conducted X-ray spectroscopic study of a large number of elements and showed that the frequency of X-rays emitted by an element is related to the atomic number, Z, rather than the atomic mass?

[SSC CGL 2022]

Newlands law of octaves was only applicable upto which element ?

[SSC GD 2024]

The Law of Octaves’ was proposed by:

[RRB NTPC CBT]

Who first discovered that every eighth element has properties similar to that of the first ?

[RRB NTPC CBT]