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 number of elements present in fifth period of Periodic Table is
Which one of the following ions has the highest value of ionic radius?
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
Which one is the correct order of the size of the iodine species.
The element with atomic number 57 belongs to
The last element of the p-block in the 6th period is represented by the outermost electronic configuration.
ns and ns outermost electronic configuration belongs to the
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Molybdenum metal is related to which block?
Which of the following order is correct for the size of Fe³⁺, Fe, and Fe²⁺?
Which one of the following pair of elements has similar properties?
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 is not a Dobereiner’s triad?
The most ionic compound will be formed between:
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
The element with highest I.E. is:
The element with lowest electron gain enthalpy is:
Consider the following statements: (I) The radius of an anion is larger than that of the parent atom. (II) The ionization energy generally increases with the increasing atomic number in a period. (III) The electronega…
Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?
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 …
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…
An element with lowest ionization energy in their respective period is
Second electron affinity