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what is the formula of oxide of element M having ionisation energies as – IE1 = 100, IE2 = 250 , IE3= 250 , IE4 =1500 kJ . OPTIONS: M2O3, M2O , MO2 MO…... what is the exact formula??

what is the formula of oxide of element M having ionisation energies as –
IE1 = 100, IE2 = 250 , IE3= 250 , IE4 =1500 kJ .
OPTIONS: M2O3, M2O , MO2 MO…...
what is the exact formula??
 

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1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
8 years ago
see the oxidation state of the oxygen atom is 2-.therefore the formula will be M2OX
where x represents the oxidation state of element M
for finding the oxidation state of the element M is
here the ionisation energy is increasing not rapidly,it means that it is easy to remove the electron from its outermost orbit.
but the fourth IE is 6 times higher.It means that the 4th electron cannot be removed easily.So in +3 oxidation state it is gaining stability.
So the formula will be M2O3

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