19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
Consider the isoelectronic species, Na+, Mg2+,F –and O2–. The correct order of increasing length of their radii is ...........
For a given value of n (principal quantum number), ionization energy is highest for
IE1 and IE2 of Mg(g) are 178 and 348 kcal mol–1 respectively. The energy required for the reaction Mg (g) ® Mg2+ (g) + 2e– is
Which of the following isoelectronic ions has the lowest ionization energy?
The order of screening effect of electrons of s, p, d and f orbitals of a given shell of an atom on its outer shell electrons is:-
Of the following orders of relative sizes, choose the incorrect order
In which of the following sets of elements, they have nearly the same atomic size
Of the following which will have the minimum atomic radius?
Which of the following represents an excited state of an atom?
If the Aufbau principle had not been followed, Ca (Z = 20) would have been placed in the:
La (Lanthanum) having atomic number 57 is a member of:
The statement that is not correct for periodic classification of elements is:
The period number in the long form of the periodic table is equal to
The lUPAC name of an element with atomic number 119 is (NEET 2022)
Identify the incorrect match. (NEET 2020) Name IUPAC Official Name
Amongst the following, select the element having highest ionisation enthalpy. (MHT CET 2014)
The compound not acting as a reducing agent is (Manipal 2014)