A review from the study sheet I got from my CHM1045 class.
Help!
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| Element | cannot be seperated into simpler substances.
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| Compound | two or more elements united chemically in definite proportions.
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| Mixture | two or more substances in which the substances retain their chemical identities.
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| Physical Change | Doesn't change chemical composition.
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| Chemical Change | One or more substances are converted into other substances.
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| Plasma | Similar to gas. Certain portion of the particles are ionized. (adapted from wikipedia)
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| Pure Substance | matter with a fixed composition and distinct properties.
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| Mixture | Combination of two or more substances in which each substance retains its own chemical identity.
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| Law of the Conservation of Matter | total mass of the products of a chemical reaction = total mass of the reactants. Mass remains constant.
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| Scientific Method | Ask a question - Research - Hypothesis - Test it - Analyze data and draw a conclusion - Report results
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| Mass Number | he total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
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| Avogadro's Number | The number of ^12C atoms in exactly 12 g of ^12C; it equals 6.022 x 10^23.
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| Law of Definite and Multiple Proportions | A law that states that the elemental composition of a pure substance is always the same, regardless of its source.
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| Types of Chemical Bonds | Ionic: refers to electrostatic forces that exist between ions of opposite charge.
Covalent bond: results from the sharing of electrons between two atoms.
Metallic bonds: found in metals.
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| Oxidation | a process in which a substance loses one or more electrons.
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| Reduction | a process in which a substance gains one or more electrons.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Katie4theA
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