19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............
Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the periodic table?
The last element of the p-block in the 6th period is represented by the outermost electronic configuration.
The element with atomic number 57 belongs to
The elements having characteristics of both metals and non-metals is/are termed as
Metals are good conductors of heat and….A….Here, ‘A’ refers to
ns and ns outermost electronic configuration belongs to the
Group I elements of modern periodic table are called
According to IUPAC nomenclature, the name of element having atomic number 116 is
Atomic to IUPAC nomenclature, the name of element having atomic number 101 is
The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2 is
The transition elements have a characteristic electronic configuration which can be represented as
Without looking at the periodic table, select the elements of IIIA group of the periodic table (atomic numbers are given) :
Which of the following pairs has both members from the same group of periodic table
In the fourth period of the periodic table, how many elements have one or more 4d electrons?
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
The periods in the Periodic Table are numbered from
The vertical columns in the Periodic Table are termed as
Atomic number is equal to the…. A…. Here, ‘A’ refers to
In 1913, Henry Moseley observed regularity in the characteries…A…of the elements. Here, ‘A’ refers to
Physical and chemical properties of elements are determined by
The basis of modern periodic table is
Which of the following is incorrect explanation about Mendeleev’s periodic law ?
Mendeleev left the gap under aluminum and a gap under silicon and called these elements Eka-Aluminium and……A……Here, A refers to
In which of the following pair, both the species are isoelectronic but first one is large in size than the second?