19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The number of elements present in fifth period of Periodic Table is
Which one is the correct order of the size of the iodine species.
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
When a chlorine atom becomes chloride ion, its size
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 ............
Which of the following pairs has almost the same atomic radii?
Which one of the following ions has the highest value of ionic radius?
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Molybdenum metal is related to which block?
The transition elements have a characteristic electronic configuration which can be represented as
Which one of the following pair of elements has similar properties?
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
Which of the following is not a Dobereiner’s triad?
ns and ns outermost electronic configuration belongs to the
Which element has the highest ionization energy?
In which of the following arrangements, the order is not according to the property indicated after it in the bracket? (Manipal 2009)
Which of the following order is correct for the size of Fe³⁺, Fe, and Fe²⁺?
The element with atomic number 57 belongs to
The element with lowest electron gain enthalpy is:
The most ionic compound will be formed between:
Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?
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…
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…
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…