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

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

I am sure no one can have two things for dinner. what are they?

I have no life, but I can die. What am I?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Can you name some countries which do not have the alphabet 'A' in them?

How can one talk without saying a single word?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

A bomb exploded in a room full of married couples and no one died. How?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?