19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In isoelectronic species of Mg²⁺, N₃–, Al³⁺, the order of decreasing ionic radii will be
Which one is the correct order of the size of the iodine species.
When a chlorine atom becomes chloride ion, its size
The number of elements present in fifth period of Periodic Table is
The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............
Which of the following pairs has almost the same atomic radii?
The last element of the p-block in the 6th period is represented by the outermost electronic configuration.
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
Which one of the following pair of elements has similar properties?
ns and ns outermost electronic configuration belongs to the
Molybdenum metal is related to which block?
Assertion: Electron gain enthalpy becomes less negative as we go down a group. Reason: The size of the atom increases on going down the group and the added electron would be farther from the nucleus.
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
The element with highest I.E. is:
The bond enthalpy is the highest for
The transition elements have a characteristic electronic configuration which can be represented as
Assertion: Generally, ionization enthalpy increases from left to right in a period. Reason: When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of the inner co…
The element with lowest electron gain enthalpy is:
The element with atomic number 57 belongs to
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Identify the correct order of the size of the following
The most ionic compound will be formed between:
An element with lowest ionization energy in their respective period is
Second electron affinity
The electronic configurations of the elements X, Y, Z, and J are given below. Which element has the highest metallic character?