Are atoms and particles the same

If you would like to be involved in its development let us know. Everything in the universe, from stars and planets, to you and the chair that you're sitting on, is made from the same basic building blocks - particles of matter. Some particles were last seen only billionths of a second after the Big Bang. Others form most of the matter around us today. Particle physics studies these very small building block particles and works out how they interact to make the universe look and behave the way it does. Think about the width of a human hair, one of the smallest things we can see — twenty of them placed side by side fit across one millimetre. If we use a microscope to look inside a hair we see cells, which are formed from molecules.