Chemistry Unit 1
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22 terms
Terms | Definitions |
|---|---|
 The Particulate Nature of Matter | The idea that all matter is made of very small particles are called "atoms". |
| Atom | The smallest unit of matter that has the characteristics of an element. It consists of three main types of subatomic particles: protons neutrons and electrons. The basic building blocks of matter. |
| Element | A substance conasisting of only one type of atom. |
| Molecule | Two or more atoms chemically combined (bonded). |
| Compound | Two different types of atoms present in the same molecule |
| Mixture | Different types off atoms and/or molecules physically combined (not chemically bonded). |
| Solid | The atoms within the substance move around quickly yet the substance stays stationary -represented by an "(s)" in a chemical formula. |
| Liqiud | The atoms within the substance move around slowly and randomly -represented by an "(l)" in a chemical formula. |
| Gas | The atoms within the substance move around quickly and far apart -represented by an "(g)" in a chemical formula. |
| Matter | Whatever has mass and takes up space - ANY AND EVERYTHING!!! |
| Standard Temperature and Pressure (STP) | ... |
| Physical properties | The characteristics of a substance that can be observed or measured without changing the substance's chemical composition. Originally materials can always be recovered. ex.) melt, boil, color, etc. |
| Chemical properties | The characteristics of a substance that cannot be observed or measured without altering the substance's chemical composition. New substance usually formed. ex.) reactions to acids and other chemicals, etc. |
| Qualitative, Quantitative | observations, measurements |
| Accuracy and Precision | ... |
| Density | ... |
| Significant Figures | ... |
| Pure Substances | ... |
| Chemical Formula | ... |
| Homogenous Mixture | ... |
| Heterogeneous Mixture | ... |
| Monatomic, Diatomic | ... |
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