Classification of Elements and Periodicity in Properties questions
826 published questions with worked solutions.
- Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The first...
- The ionic radii (in Å) of N^ 3- , O^ 2- and F^- are respectively:
- In the long form of the periodic table, the valence shell electronic configuration of 5s^25p^4 corresponds to the element present...
- Aqueous solution of which of the following salts will not contain ions with the electronic configuration 1s^22s^22p^63s^23p^6 ?
- The following statements concern elements in the periodic table. Which of the following is true?
- Among the following species which option contains all isoelectronic species?
- Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is...
- Consider the following ionization enthalpies of two elements 'A' and 'B'. A: 1^ st 899, 2^ nd 1757, 3^ rd 14847; B: 1^ st 737, 2^...
- Which one of the following groupings represents a collection of isoelectronic species? (At. no. Cs=55, Br=35) **[AIEEE 2003]**
- Which one of the following ions is not isoelectronic with O ^ 2- ?
- Mg ^ 2+ is isoelectronic with
- An isoelectronic pair among the following is **[UP SEE 2008]**
- Which one of the following sets of ions represents a collection of isoelectronic species? **[AIEEE 2006]**
- Ca ^ 2+ is isoelectronic with
- The electronic configuration of an element in its ultimate and penultimate orbitals is (n-1)s^2(n-1)p^6(n-1)d^xns^2. If n=4 and...
- The one-electron species having ionisation energy of 54.4 eV is
- A photon having a wavelength of 845 Å causes the ionisation of an N atom. What is the ionisation energy of N? **[BCECE 2003]**
- The ionisation energy of the hydrogen atom is 13.6 eV. What will be the ionisation energy of He ^+?
- Consider the ground state of the Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l=1 and l=2 are,...
- What is the electronic configuration of Mn ^ 2+ ? **[BCECE 2008]**
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