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Chemistry Exam 1
| Term | Definition |
|---|---|
| Chemistry | The study of the structure and properties of various materials. |
| Scientific Method | A logical approach to the solution of a problem. |
| Qualitative | A description without a measurement. |
| Quantitative | A description with a measurement. |
| Weight | The force with which an object is pulled toward the earth. |
| Mass | The measure of the amount of matter in an object. |
| Temperature | The average kinetic energy of the particles in a material. |
| Accuracy | The nearness of a measurement to its accepted value. |
| Precision | The agreement between measurements made in the same manner. |
| Matter | Anything that has mass, takes up space, and exhibits inertia. |
| Phase | A physically separate material with a unique set of properties. |
| Mixture | A combination of 2 or more materials each retaining their own properties. |
| Colloid | A heterogeneous mixture in which the particles do not settle upon standing. |
| Suspension | A heterogeneous mixture in which the particles settle upon standing. |
| Solution | A homogeneous mixture. |
| Substance | Matter with a constant composition throughout. |
| Compound | A combination of 2 or more atoms in a definite ratio. |
| Element | A homogeneous substance that consists of 1 type of atom. |
| Property | A characteristic of matter. |
| Density | The mass of a substance per unit volume. |
| Heat | Thermal energy that is transferred due to a difference in temperature. |
| Activation Energy | The energy required to start a chemical reaction. |
| Atom | The smallest part of an element that still has the properties of that element. |
| Anode | The positive electrode. |
| Cathode | The negative electrode. |
| Isotope | An atom of the same element with a different mass number (number of neutrons). |
| Atomic Number | The number of protons in an atom. |
| Mass Number | The sum of the number of protons and neutrons in an atom. |
| Radioactivity | Occurs when rays are being produced spontaneously by an unstable atomic nucleus. |
| Spectroscopy | The study of the interaction between matter and radiant energy. |
| Frequency | The number of waves that pass a given point each second. |
| Wavelength | The linear distance between corresponding points on consecutive waves or the distance from crest to crest. |
| Heisenberg Uncertainty Principle | It is impossible to know the exact location and momentum of a particle at the same time. |
| Orbital |
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ajgaz98
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