Classification of Elements and Periodicity in Properties questions
826 published questions with worked solutions.
- Ionisation energy of M^ 3+ is 217.6 eV compared to that of He^+ (54.4 eV). Thus, the atomic number of M is ______
- A diatomic molecule is formed by the element at serial number (1) and the element at serial number ______: (1) [Ne]3s^23p^1 (2)...
- IP_2 for an element is invariably higher than IP_1 because
- The order of first electron affinity of O, S and Se is
- The increasing order of the ionic radii of the given isoelectronic species is
- Na^+, Mg^ 2+ , Al^ 3+ , Si^ 4+ are isoelectronic. Their ionic size follows the order
- Among the following elements, the most electronegative is
- Which group of atoms have nearly the same atomic radius?
- The ionisation potential of Na would be numerically the same as
- Which of the following atoms has the minimum covalent radius?
- Ionisation potential values of d-block elements, as compared to ionisation potential values of f-block elements, are
- The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
- IP_1 and IP_2 of Mg are 178 and 348 kcal mol^ -1 . The energy required for the reaction Mg Mg^ 2+ + 2e^- is
- The size of ionic species is correctly given in the order
- K^+, Cl^-, Ca^ 2+ , S^ 2- ions are isoelectronic. The decreasing order of their size is
- Ionization potential is lowest for
- The ionization energy of nitrogen is more than that of oxygen because
- Which of the following configurations is associated with the biggest jump between the 2nd and 3rd ionisation energies?
- In which pair is the first atom or ion not larger than the second?
- Which of the following sequences regarding the ionisation potential of the coinage metals is correct?
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