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| 1) Matter | Anything that has mass and takes up space. |
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2) Element |
Compose of one type of an atom and cannot be broken down into a simpler substance. |
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3) Atom |
The smallest particle into which an element can be divided and still have the properties of that element. |
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4) Subatomic Particle |
Particles smaller than an atom, that combine together to form an atom. (Protons, Neutrons, Electrons) |
| 5) Proton | A positively charged subatomic particle that resides within the atomic nucleus. |
| 6) Neutron | A subatomic particle contained in the nucleus. It has NO net electric charge, unlike the proton’s positive electric charge. |
| 7) Electron | A subatomic particle that carries a negative electrical charge, and resides outside of the nucleus. |
| 8) Valence Electron | An electron in the outer most shell (energy level) of an atom, which can combine with other atoms to form molecules. |
| 9) Nucleus | The center of an atom where all of the mass of that atom is located. It is made up of protons and neutrons. |
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10) Electron Cloud |
The region around the nucleus of an atom, where electrons are found. |