Hello!
I don't know a lot of this but after doing just a bit of research I think the answer is either A. or C. but I think it is A.
Hope it helps?
Answer:
its ability to lose electron
Wavelength = (planck’s constant) (speed of light) / Energy
6.2 (Energy) = (6.63 •10^-34) (3•10^8)
1.989•10^-25 / 6.2 =
3.2081 • 10^-26 is the answer