02 Zero se Hero || Electronic Configuration Basic aani chahiye sabse achha

State the basic ideas which are violated by each of the following electronic configurations and replace each by the correct configuration. (a) B_(5)-1s^(2)2s^(3) , (b) Na_(11)-1s^(2)2s^(2)2p^(6)2d^(1) , (c) K_(19)-[Ar]3d^(1) , (d) Ti_(22) -[Ar]4s^(2)4p^(2) .

Which properties of element depend on the electronic configuration of atoms and which do not (b) Why the chemical properties of a group are similar Why do they not have identical properties (c ) Account for the great chemical similarity of the lanthanoid elements (Z =57 to 71) (d) Select the largest species in each group (i) Ti^(2),Ti^(+3) (ii) F^(Θ),Ne,Na^(o+) (e) Select the species with the largest IE in each group (i ) na,K,Rb (ii) F,Ne,Na (f) Which ion has the smallest radius Li^(o+),Na^(o+),K^(o+) Be^(+2), Mg^(+2) (g) Select among the element that has the lowest and highest IE K, Ca, Se, B, Kr , (h) The ionic radii of S^(2-) and Te^(2-) are and 220 pm respectively Predict the ionic radius of Se^(2-) and for p^(3-) (i) In the ionic compound KF the K^(o+) and F^(o+) have practically identical radii, about 134 pm each. Predict the relative atomic radii of 1 K and F .

What is the basic difference between the electronic configuration of transition and inner transition elements?

Justify the placement of O, S, Se, Te and Po in the same group of the periodic table in terms of electronic configuration, oxidation state and hydride formation.

Justify the placement of O, S, Se, Te and Po in the same group of the periodic table in terms of electronic configuration, oxidation states and hydride formation.

(a) What is the basic difference between the electronic configuration of transition and inner transition elements ? (b) Describe the general trends in the following properties of 3d transition elements . (i) Atomic size (ii) Oxidation state (iii) Formation of coloured ions.

The periodicity is related to the electronic configuration. That is, all chemical and phyical properties are a manifestation of the electronic configurfation of the elements. The atomic and ionic radii generally decrease in a preiod from left or right. As a consequence , the ionisation enthalpies generally increase and electron gain enthalpies become more negative across a period. In other words, the ionisation enthalpy of the extreme left element in a period is the least and the electron left element on the extreme right is the highest negative. This results into high chemical reactivity at two extgremes and the lowest in the centre. Similarly down the group, the increase in atomic and ionic radii result in gradual decrease (with excetption in some third period elements) in electron gain enthalpies in the case of main group elements . These properties can be related with the (i) reducing and oxidising behacviour of the elements (ii) metallic and no-metallic charcter of element (iii) acidic, basic , amphoteric and neutral character of the oxides of the elements. Which of the following statement is incorrect?