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  Actually, expressing matter is not that simple. It is best to use simple recipes that you remember from elementary school. Matter is anything that has mass and volume. We know a lot about matter. For example, it has four states: solid, liquid, gas, and plasma. It is made up of atoms. Since ancient times, it has been assumed that matter consists of atoms. If you cut a board in half, both pieces become boards. As long as we keep dividing the pieces, they will always be wood. We have two options here. To accept that matter can be divided forever, or to assume that there is one or more elementary particles that make up matter. According to an idea developed in ancient Greece, matter had basic building blocks that could no longer be divided, and these components were called "atoms", meaning "undivided." Until the beginning of the 21st century, Until the time when the existence of atoms was experimentally proven, some scientists believed in the existence of atoms and s