Thank you everyone for your answers and participation, although the thread has started to turn into an argument (which wasn't the purpose of this thread). This poll/thread was intended for a scientific research. This wasn't mentioned in order to prevent any possible biases. This research is...
You're friend is wrong. Being atheist doesn't mean you reject god. It only means : "I don't believe there is a god (or gods) because there's absolutely no evidence that support the existence of god (gods)."
Are you aware of virtual particles? They pop in and out of existence out of nothing. They may be 'virtual' but they do have real physical effects. Go look at the wikipedia article of 'Casimir Effect' for more info. It's not god, it's only quantum mechanics. By the way, do you know what E=mc2...