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Yr 10 Atomic Science
Vocabulary for Yr 10 Atomic Science Topic
| Term | Definition |
|---|---|
| Atom | A unit of matter, made up of protons, neutrons, and electrons. |
| Atomic Number | The number of protons in an atom. This is also equal to the number of electrons in an atom. |
| Balanced Equation | An equation in which the number of atoms of each type is the same on both sides of the arrow. |
| Chemical Change | A change which results in new substances being formed. Not easily reversed. |
| Compound | A substance made of more than one type of atom, chemically combined in a fixed ration. |
| Electron | Small, negatively-charged particle, which orbits the nucleus of an atom. |
| Electron Configuration (E.C.) | The arrangement of electrons around the nucleus in electron shells, e.g. 2, 8, 6. |
| Electron Shell | A grouping of atoms around the nucleus of an atom. |
| Element | A substance made of only one type of atom. |
| Ion | An atom which has lost or gained electrons. |
| Mass Number | The number of protons + neutrons in an atom. |
| Mixture | A substance made of two or more different elements or compounds that are not chemically combined in a fixed ratio. |
| Molecule | Two or more atoms chemically bonded together. |
| Neutron | Particle with no charge, present in the nucleus of an atom. |
| Nucleus | The centre of an atom, made up of protons and neutrons. Makes up most of the mass of an atom. |
| Physical Change | A change in the state of a substance. Usually reversible. |
| Proton | Positively-charged particle in the nucleus of an atom. |
Created by:
CMontaperto
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