Question

the correct order of forst ionisation potebtial among the following elements Be,C,B is ?

Answer 1

B<Be<C is the correct order. On moving from left to right ionisation enthalpy decreases. But Be is having high IE than B because it has 2s2 electrons which is most stable than 2p1 electrons.

Answer 2

Hey mate!

Here is yr answer....

Ionization potential :
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<> The amount of energy required to remove an electron from the outermost shell(orbit) of an atom

<> In groups IP < and in periods it >..... bcoz of

-Atomic radius

-Shielding effect

-nuclear charge

-Penetration power of orbitals

-Stable configuration

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Among. Be, C, B... Berylium has the greater atomic radius than Boron and Carbon and next Boron has the Greater atomic radius than Carbon . If more the atomic radius Less IP...

__________________________

Be - 1s² 2s²

B - 1s² 2s² 2p¹

C 1s² 2s² 2p²

He, If we consider Nuclear charge C has more nuclear charge than B and Be, and B has more nuclear charge than Be... More the nuclear charge, more the IP

We can say the order is C > B > Be

But, Be has stable EC ---- 2s² ...while boron has 2p¹

Therefore, considering all factors of IP -- the order

C > Be > B

Hope it helps....