An atom is smaller than anything we can see with our eyes., , Every solid, liquid, and gas is made of atoms., , The center of an atom is called the nucleus., , Protons and neutrons are found inside the nucleus of an atom., , Electrons move around the outside of the nucleus., , Different kinds of atoms are called elements., , Gold, oxygen, and carbon are all made from different types of atoms., , Scientists use special tools and models to study atoms because they are so tiny., , Most of the mass of an atom is found in its nucleus, even though the atom itself is mostly empty space., , The way atoms combine and interact with one another helps create everything in the universe, from stars to living things., .

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