Iodine jokes

My sister thinks she's so smart. She said, "Onions are the only food that makes you cry." So I threw a coconut at her.

I’d tell a sodium and hydrogen pun, but NaH.

An atom loses an electron... It says, "Man, I really gotta keep an ion them."

Why did the electron leave the atom?

Because it had its ion someone else.

Teacher tests Little Johnny, “OK, Johnny, create a sentence which starts with ‘I’.”

Little Johnny confidently starts, “I is...”

Teacher snaps, “No, Little Johnny. You must always say, ‘I am’.”

Little Johnny sighs, “Yes ma’am. ‘I am the ninth letter of the alphabet.’”