Answer:
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
What is long and slim, works in light. Has but one eye, and an awful bite?
My first is in fish but no in snail. My second is in rabbit but no in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
The root tops the trunk on this backward thing, that grows in the winter and dies in the spring.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?