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Which of the following is the correct or...

Which of the following is the correct order of ionisation enthalpy ?
(1)Be+ > Be
(2) O > N
(3) C > Be
(4) F > Ne

Text Solution

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The correct Answer is:
3
Be, C and F are the elements of same period (2nd period) hence, `Be gt C gt F.` But Ne is an inert gas, whose Van der Waals radii is exceptionally high, hence, `Ne gt Be gt C gt F`
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