Nuclear Fusion - The process of two lighter atoms combining to create a heavier element and a lot of energy., Stellar Nucleosynthesis - The process in which nuclear fusion reactions in stars create heavier, more complex elements., Star - A massive celestial body made of hot gas, like hydrogen and helium, which generates light and heat through nuclear fusion reactions occurring in its core, Atom - The basic particles that make up elements that consists of a nucleus with protons and neutrons and electrons that float around the nucleus, Proton - A positively charged particle that is located in the nucleus of the atom. The amount of these determine what type of element it is., Neutron - A neutral particle located in the nucleus of an atom. These plus protons determine the atomic mass of an atom., Electron - A negatively charged particle that floats around the nucleus of an atom. The amount of these determine what ion an element is., Element - A substance that is made of only one type of atom. The amount of protons in the atom determines what it is., Hydrogen - An element that consists of one proton in its nucleus. It is the simplest element and makes up ~74% of all the matter in the universe., Helium - An element that consists of two protons in its nucleus. It is the second simplest element and makes up ~25% of all the matter in the universe., Energy - A force that can act on others. Can be in many forms such a heat and light. It cannot be created nor destroyed, only transferred., Matter - Any object that takes up physical space and can be weighed. Typically comes in a solid, liquid, or gas.,

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