Question

write the ionization of He+

Answer 1

You can do it like this:

Explanation:

You are given the expression for the energy of the electron:

En=−(2.18×10−18)Z2[1n2]

When the electron is in its ground state, the value of the principle quantum number n is 1.

n can take values 1, 2, 3, 4..... etc.

For these higher energy levels you can see that the value of 1n2 will get smaller and smaller.

The means that the gap in energy between successive energy levels gets less and less such that they converge and eventually coalesce.

At this point as n tends to infinity so 1n2 tends to zero.

An electron excited to this point can be regarded as ionised i.e it has left the atom.

The difference in energy between these levels will represent the ionisation energy.

I.E.=−(2.18×10−18)Z2×0−[−2.18×10−18×Z2[112]

For He+ there are 2 protons in the nucleus ∴Z=2

∴I.E.=2.18×10−18×221=8.72×10−18xJ

To convert to kJ divide by 1000⇒

I.E.=8.72×10−21xkJ

This is the energy required to ionise a single He+ion.

To find the energy required to ionise a mole of ions you need to multiply by The Avogadro Constant which is 6.02×1023xmol−1.

I.E=8.72×10−21×6.02×1023=5250xkJ/mol

plzz mark as brainliest answer