Okay Calm down,lol. I think I can figure this out....
Heres What I got. I hope it Helps.
best Answer:
Diameter :D,
Radius:RD= 2R R= 1.4 angstrom 1 angstrom=0.00000001 cm=
10^-7cm R =1.4 * 10^-7cm D=2.8* 10^-7 cm
I hope this helps instead of me mumbling. XP