List of top Chemistry Questions on Periodic Table

The law of octaves was proposed by:
Match List-I with List-II :
List - I(Block/group in periodic table)List - II(Element)
(A) Lanthanoid(I) Ce
(B) d-block element(II) As
(C) p-block element(III) Cs
(D) s-block element (IV) Mn
Identify the correct answer from the options given below :
Given below are two statements:
Statement (I) : Oxygen being the first member of group 16 exhibits only –2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In the light of the above statements, choose the most appropriate answer from the options given below:
Arrange the following ions in increasing order of ionic radii:
(A) Eu$^{3+}$
(B) Lu$^{3+}$
(C) Y$^{3+}$
(D) La$^{3+}$
Choose the correct answer from the options given below:
If the first ionisation enthalpy of Li, Be and C respectively are 520, 899, 1086 kJ/mol, the first ionisation enthalpy (in kJ/mol) of B will be

Match the following: 

The correct order of atomic radii of N, F, Al, Si is:

The electronic configuration of four elements are given below:

Which member of the 15 group elements does not show allotropy?
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The first ionisation enthalpy decreases across a period.
Reason R: The increasing nuclear charge outweighs the shielding across the period.
In the light of the above statements, choose the most appropriate from the options given below:
If IUPAC name of an element is “Unununnium” then the element belongs to nth group of periodic table. The value of n is______
Given below are the two statements: one is labelled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): There is a considerable increase in covalent radius from N to P. However from As to Bi only a small increase in covalent radius is observed.
Reason (R): covalent and ionic radii in a particular oxidation state increases down the group.
In the light of the above statement, choose the most appropriate answer from the options given below:
Which of the following tests is positive for the given compound [A]? 
tests is positive
Write the electronic configurations of Kr (Z = 36) and Xe (Z = 54).
Arrange F₂, Cl₂, Br₂, and I₂ in the increasing order of electron affinities.
What is the scientific name of the person who made the periodic table?
In the modern periodic table, the elements are arranged in:
Number of elements present in the sixth period of the modern periodic table
IV A group elements are called
Law of octaves was proposed by
Element with atomic number 17 belongs to
An element ‘X’ belongs to 2nd group and 3rd period. What is its valency?
Which of the following sets of elements is not correctly arranged according to the given property?
Match the following:
Group Numbers of Elements
Explain lanthanide contraction clearly and give reason why many compounds of transition elements remain coloured.