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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