Lothar Meyer arranged the elements in order of increasing:
Law of Octaves was proposed by:
The generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.
Law of Triads is applicable to which set of elements?
In Mendeleev’s periodic table, the groups were divided into how many subgroups?
Modern periodic table is divided into:
Moseley performed experiments and studied the frequencies of which radiations emitted from the elements?
Over 100 years ago, Henry Moseley carried out a systematic series of experiments that showed that the frequencies of the X-rays emitted from an elemental target under bombardment by cathode rays were characteristic of that element and could be used to identify the charge on its atomic nucleus.
Among the following statements the one that is not true about Mendeleev’s Periodic Table is:
Since statement A states that groups 7 and 8 were arranged on the basis of equivalent weights, it stands incorrect.
Which scientist proposed that atomic number is more fundamental property of an element than its atomic mass?
In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass.
Johann Dobereiner classified elements in group of three elements called as:
In the modern periodic table, which period contains 32 elements?
Horizontal rows in the periodic table are called:
The second and third period of the modern periodic table contains how many elements in all?
Newland arranged elements in increasing order of atomic weights and noted that every eighth element had properties similar to:
According to Dobereiner’s law of triads the number of elements present in each group is:
Lothar Meyer proposed that on arranging the elements in order of increasing atomic weights; similarities appear in which type of properties?
Eka silicon predicted by Mendeleev is which element:
Eka aluminium predicted by Mendeleev is which element?
Eka aluminum predicted by Mendeleev is Gallium.
Eka-aluminum and gallium are two names for the same element, as Eka-Aluminium has almost identical properties to the gallium element itself.
Additional information: Mendeleev names unnamed elements as EKA- Boron EKA- Aluminium and EKA Silicon which were later replaced as Scandium, Gallium, and germanium respectively.
The basis of long form of periodic table is:
In the long form of the periodic table elements are arranged in increasing order of their Atomic number.
Mendeleev predicted the existence of which element/elements in the periodic table?
At present how many elements are known?