Question

I can never understand chemistry! what the heck is an atom anyways?

Answer 1

http://openstudy.com/study#/groups/Chemistry :)

Answer 2

An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud

Answer 3

ok? so hydrogen "reacts" with oxygen gives water? where does that come from?

Answer 4

they need so much energy to combine