જો ઈલેક્ટ્રોનિય ગોઠવણી $M = 2,\,\,8,\,\,3$ અને $A = 2,\,\,8,\,\,7,$ છે. તો નીચેના માંથી ક્યાં સંયોજન નું સૂત્ર બનશે
A${M_2}{A_3}$
B$M{A_2}$
C${M_2}A$
D$M{A_3}$
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d \(M\) belongs to \(III- A\) group and \(A\) belongs to \(V II -A\) group. thus a formuma is \(MA _3 \,\,e , g , AlCl _3\)
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