Chemistry Question Bank

When a chlorine atom becomes chloride ion, its size

The number of elements present in fifth period of Periodic Table is

Which of the following pairs has almost the same atomic radii?

The correct order of the sizes of C, N, P, S, is

Identify the correct order of the size of the following

The last element of the p-block in the 6th period is represented by the outermost electronic configuration.

The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............

The element with atomic number 57 belongs to

Which one of the following pair of elements has similar properties?

In which of the following pair, both the species are isoelectronic but first one is large in size than the second?

ns and ns outermost electronic configuration belongs to the

The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the

Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute

The transition elements have a characteristic electronic configuration which can be represented as

Which of the following is not a Dobereiner’s triad?

The elements with atomic numbers 9, 17, 35, 53, 85 are all

Without looking at the periodic table, select the elements of IIIA group of the periodic table (atomic numbers are given) :

Which of the following orders of ionic radii is correctly represented? [AIPMT 2014]

The correct order of ionic size of N₃–, Na⁺, F–, Mg²⁺ and O₂–is:

Molybdenum metal is related to which block?

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.

Assertion: Third ionization energy of sulphur is larger than phosphorous. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which correspond…

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 …