19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Identify the correct order of the size of the following
When a chlorine atom becomes chloride ion, its size
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
The oxide of an element whose electronic configuration is 1s2, 2s2 2p6, 3s1 is (KCET 2009)
The number of elements present in fifth period of Periodic Table is
Which one of the following ions has the highest value of ionic radius?
Which one is the correct order of the size of the iodine species.
Correct order of radii is
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?
The transition elements have a characteristic electronic configuration which can be represented as
The element with atomic number 57 belongs to
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
The elements with atomic numbers 9, 17, 35, 53, 85 are all
The last element of the p-block in the 6th period is represented by the outermost electronic configuration.
Which of the following is not a Dobereiner’s triad?
In which of the following arrangements, the order is not according to the property indicated after it in the bracket? (Manipal 2009)
The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............
The most ionic compound will be formed between:
The element with lowest electron gain enthalpy is:
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…
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.
The element with highest I.E. is:
A, B, and C are hydroxy-compounds of the elements X, Y, and Z respectively. X, Y, and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids …