My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Out of four images which one is the odd one out?

What happened when the wheel was invented?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Which country gets ill every time?

What is the next number in this series?

4,12,84,3612....

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?