What is meant by the term bond order? Calculate the bond order of: N 2, O 2,O 2 +,and O 2 -.Ģ.9 g of a gas at 95 ☌ occupied the same volume as 0.184 g of dihydrogen at 17 ☌, at the same pressure. What is the molar mass of the gas?Ĭalculate the temperature of 4.0 mol of a gas occupying 5 dm 3 at 3.32 bar.Some heavier elements of the III, IV & V group having configuration of outer most shell ns2 np1 ns2 np2 ns2 np3 show valencies with a difference of 2 i.e (1 & 3) ( 2 & 4 ) ( 3 & 5) respectively. In case of lower valencies, only electrons present in p-subshell are lost and s-electrons remain intact. The reluctance of s-electron pair to take part in bond formation is known as ‘inert pair effect’. When sufficient energy is available, the s-electrons also enter into bond formation and higher valencies are observed. This tendency to show higher valencies is less in Tl, Pb & Bi but more in Sn, In & Sb etc. In a multi electron atom, the electrons present between the nucleus and the valence shell i.e inner electrons shield the valence electrons from the nucleus.
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