Who Am I?

Hello everyone, I'm back again, and, it's been quite a while, so I decided to do a Who Am I. By the way, India won the Cricket World Cup 2011! Enjoy!

1. I am a famous nurse born in 1820. I served as one in the Crimean War. I'm the lady with the lamp. Who Am I?
2. I am a famous actor born in 1943. I gave the voice for Lenny's father in 'Shark Tale'. Who am I?
3. I am a famous English chemist. I am best known for my pioneering work in the development of the modern atomic theory.Who am I?

I'll give the answers next day, and sorry for the number of questions I gave, I'm in a huge hurry. Bye!!