The frequency of the point of convergence on a hydrogen emission spectrum is 32.883 x 1014 s-1.
What is the ionisation energy for one atom of hydrogen?
(h = 6.63 x 10-34 J s)
32.883 x 1014 x 6.63 x 10-34 J
J
J
J
The first five ionisation energies of an element are shown below.
What element could this ionisation energy graph belong to?
![successive-ionisation-energy](../../../../../../../../../../cdn-cgi/image/index-1208.htm?f=auto,width=472,height=296/uploads/2022/04/successive-ionisation-energy.PNG)
Which are correct explanation(s) for the increase in ionisation energy across a period?
I. Nuclear charge increases
II. Atomic radius decreases
III. Shielding remains constant