1.

Consider the followng changes: M(s) to M(g). . . (1) M(s) to M^(2+)(g) +2e^(-). . . (2) M(g)to M^(+)(g)+e^(-). . . (3) M^(+)(g) to M^(2+)(g)+e^(-) . .(4) M(g) to M^(2+)(g)+2e^(-) . . . (5) The second ionization energy of M could be calculated from the enrg values associated with:

Answer»

1+3+4
2-1+3
1+5
`5-3`

Solution :Drvonf IONIZATION ENERGY is amount of enegy required to take out an electron from the monopositive cation.
Hence, `M(G)to M^(2+)+2e^(-)` . . . (5)
`M(g)TOM^(+)+e^(-)`. . . (3)


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