Classification of Elements and Periodicity in Properties questions
826 published questions with worked solutions.
- Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is...
- Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given...
- The CORRECT order of first ionization enthalpy is :
- The correct order of ionic radii for the ions P^ 3- , S^ 2- , Ca^ 2+ , K^+, Cl^ -1 is :
- Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period....
- Electromagnetic radiation of wavelength 663 nm is just sufficient to ionise the atom of metal A. The ionization energy of metal A...
- In which of the following pairs, the outer most electronic configuration will be the same?
- The ionic radii of F^- and O^ 2- respectively are 1.33 and 1.4 Å, while the covalent radius of N is 0.74 Å. The correct statement...
- Number of electrons present in 4f orbital of Ho^ 3+ ion is_____. (Given Atomic No. of Ho = 67)
- The ionic radii of K^+, Na^+, Al^ 3+ and Mg^ 2+ are in the order :
- The correct order of electron gain enthalpy is :
- Match List-I with List-II: List-I (Electronic configuration of elements): (a) 1s^22s^2 (b) 1s^22s^22p^4 (c) 1s^22s^22p^3 (d)...
- The first ionization enthalpies of Be, B, N and O follow the order
- The IUPAC nomenclature of an element with electronic configuration [Rn] 5f^ 14 6d^ 1 7s^ 2 is
- The correct order of electron gain enthalpies of Cl, F, Te and Po is
- The pair, in which ions are isoelectronic with Al^ 3+ is-
- The metal that has very low melting point and its periodic position is closer to a metalloid is
- Given two statements below: Statement I : In Cl_ 2 molecule the covalent radius is double of the atomic radius of chlorine....
- Which of the following elements is considered as a metalloid?
- Which one of the following sets of ions represents a collection of isoelectronic species ? (Given : Atomic Number : F : 9, Cl :...
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