Question

Select the correct statements about atomic and ionic sizes below. Check all that apply. O sis smaller than O Au is smaller than Au AP is smaller than Mg2 Na is smaller than Na Mg is smaller than Al Cl is smaller than CI CI is smaller than Cl Oo2 is smaller than S2 Au is smaller than Au Na is smaller than Na

Answer 1

Dear student,

Al3+ and Mg 2+ • A13+ and Mg 2+ are isotonic atom. for two isotonic atoms size of decreases on increasing positive charge. Hence, Mg 24 has more ionic radius than Aest. Na and Nat To make wat in from Na, sé has to be remone due to which no.q e changes from 11 to 10 but no. of proton is some as 11, so electrostatic attraction is mare in Nation due to which size reduces. Hence size 9 Na atom is more than Nation

Auswer - S2- and 02- Down the group shell number Encreases due to which é is in the valence shell is at larger distance from nucleus. valence shell electronic configuration is 32 – 38² 306 02- 28²206 Hence ionic size s² is more than 02 han oz-

cl and cl To make el-ion from et, le has to be act added due to which no. g en change from 17 to 18 but no. of proton is same as 17. so, electrostatic repulsion is more in clain, due to which size increases Hence size of cď im is more than I adom

Aut and Aust To make Au²+ ion from Altin 2e is) has to be remoned, dere to which no. q é changes from 78 to 76 but the no. g proton is same as 79. due to this electrostatic force a attraction, es more in Aust in than Aut, dare to which size reduces. Hence size of Allt is more than Au 3+

Hence correct options are -

3 , 6 , 8 , 9 , 10.

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