Chemistry - PERIODIC TABLE Question with Solution | TestHub
Consider the given statements in general and identify the number of correct statements(s) out of the following:
i) For Isoelectronic species, as number of protons increases, the size of ion decreases.
ii) All subshells of a particular subshell provide similar shielding effect.
iii) As a result of lanthanide contraction, Zr and Hf have almost the same radii, which accounts for their occurrence together in nature and for the difficulty faced in their separation.
iv) The size in "d" block from top to bottom in a group involving 4d and 5d series elements follow the order :
v) To calculate vanderwaal radius of an inert gas, it must be calculated in liquid state.
vi) Electron Affinity of a cation is always positive.
vii) Ionization Enthalpy and Electron Affinity processes are always reverse of each other.
viii) Size of is significantly larger than .
Answer:
Solution:
(i), (iii), (vi) and (viii) are correct.
All subshells do not provide similar shielding effect since the shapes are different.
Sc group follows the size order :
Vanderwaal radius can only be calculated by solidifying the inert gas.
IE and EA are totally different processes.