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| A submicroscopic particle with a nucleus and orbiting electrons. The smallest unit of a chemical element. |
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| Electrical property of objects that causes them to attract or repel one another. Is either positive or negative. |
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| is between electrically charged particles and magnets. Holds electrons to the nuclei of atoms. |
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| low mass negatively charged subatomic particle.Orbit the nucleus of atoms. |
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| A particle that carries (or exerts) the strong force between quarks. |
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| force exerted on one body from another due to gravity. The force is directly proportional to the masses of both bodies involved and the distance between them. |
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| An explanation proposed after observation based on facts. |
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| A theory that can be expressed in mathematical form. |
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| Theoretical representation of an object or system. |
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| Tiny neutral particles with immense penetrating power. Made when stars fuse hydrogen into helium or during supernovas. |
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| subatomic particle with almost same mass as a proton but no electric charge. make up the nucleus of an atom along with protons. |
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| Particle of visible light or other electromagnetic radiation. |
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| Positively charged subatomic particle. Make up nucleus of atoms with neutrons and determine the type of atom. |
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| fundamental particle of matter that interacts via the strong force. Basic part of protons and neutrons. |
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| the process of observing something, making a hypothesis to explain it,and testing the hypothesis. |
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| The current theoretical model that describes the fundamental particles and forces in nature. |
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| The force that holds quarks together and binds protons and neutrons together. sometimes called nuclear force. |
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| Hypothesis or set of hypotheses that become well established through repeated testing. |
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| The assumption that physical laws on earth apply everywhere in the universe. |
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| Responsible for radioactive decay of atoms. Linked to electric and magnetic forces in what is called electroweak force. |
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