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G8 Seq 1 - Atoms
Grade 8 Q3 S1 - What is the structure of matter? (Atoms)
| Term | Definition |
|---|---|
| Scientific theory | a well-tested explanation of natural events based on evidence |
| Scientific law | a statement that describes a pattern in nature that always happens under certain conditions |
| Atoms | the smallest unit of matter that still has the properties of an element |
| Atomic theory | the idea that all matter is made of atoms and that atoms combine in specific ways to form substances |
| Element | a pure substance made of only one kind of atom |
| Sub-atomic particles | the smaller parts that make up an atom, including protons, neutrons, and electrons |
| Electron | a negatively charged particle that moves around the nucleus of an atom |
| Nucleus | the center of an atom that contains protons and neutrons |
| Proton | a positively charged particle found in the nucleus of an atom |
| Neutron | a particle with no charge found in the nucleus of an atom |
| Atomic mass | the total number of protons and neutrons in an atom’s nucleus |
| Atomic number | the number of protons in an atom, which determines the element |
| Periodic table | a chart that organizes all known elements by their properties and atomic number |
| Scientific models | representations used to explain or predict scientific ideas, systems, or processes |
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