Two guys are conversing in the Mens Toilet during Chemistry Exams...

Guy 1 : You Gotta Help Me!
Guy 2 : I am just here to pee...I can't help during test.

Guy 1 : Please help, or else I will fail.
Guy 2 : Okay, be quick...ask what you want to know?

Guy 1 : What is the symbol for Nobelium?
Guy 2 : NO

Guy 1 : But you said you will tell me...
Guy 2 : NO!

Guy 1 : Ok, leave it tell me symbol for Sodium ?
Guy 2 : Na!

Guy 1 : Damn, at least tell me symbol for Potassium ?
Guy 2 : K!

Guy 1 : What's okay?
Guy 2 : Just K!

Guy 1 : What's just OK?
Guy 2 : You Mean OK2?

Guy 1 : Whats OK too?
Guy 2 : Potassium Oxide.

Guy 1 : Oxide?
Guy 2 : O

Guy 1 : Oh! What??
Guy 2 : Oxygen

Guy 1 : Damn not Oxygen, I asked for Potassium ?
Guy 2 : K

Guy 1 : No
Guy 2 : Nobelium

Guy 1 : Nobelium?
Guy 2 : NO

Guy 1 : Just give me the answer of bonus question. What's Element166?
Guy 2 : UHH

Guy 1 : Go on?
Guy 2 : UHH

Guy 1 : Uhh??
Guy 2 : Exactly

Guy 1 : NO, what is it???
Guy 2 : Nobelium

Guy 1 : For God's sake at least tell me symbol for URANIUM!
Guy 2 : That's U !

Guy 1 : I know that's upto me ...but I am asking for your help !!
Guy 2 : U !

Guy 1 : No you !!!
Guy 2 : Nobelium . Uranium

Guy 1 : You are an A*s!!
Guy 2 : U AR N AS.....that's URANIUM (U) ARGON (AR) NITROGEN (N) Arsenic (AS)

Guy 1 : You Are An A*s!!!
Guy 2 : Exactly !!

Guy 1 : Baaah!!!
Guy 2 : Barium !