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Dr. H LG07
Dr. Heiny: Learning Guide 07
Question | Answer |
---|---|
Compound | a substance made of two or more kinds of atoms that are chemically combined |
Chemical change | a change in the composition of a substance; a rearrangement of the atoms into a new substance |
Chemical properties | ability to form new substances |
Elements | substances containing only one type of atom |
Matter | has mass and occupies space. |
Physical change | a change in which the composition of the substance is not altered |
Chemical reactions | another term for chemical changes |
Atom | the fundamental unit of which elements are composed; the smallest sample of an element that has all the properties of that element, generally composed of the three subatomic particles (electrons, protons, and neutrons). |
Chemical change | the change of substances into other substances through a reorganization of the atoms; a chemical reaction. |
Chemical properties | Exhibited by matter as it undergoes changes in composition; The ability of a substance to change to a different substance. |
Compound | A pure substance with constant composition that can be broken down into elements by chemical processes. |
Elements | A pure substance that cannot be decomposed into simpler substances by chemical or physical means. It consists of atoms all having the same atomic number. |
Extensive properties | A non inherent property of a system, such as volume or internal energy, that changes with the quantity of material in the system; the quantitative value equals the sum of the values of the property for the individual constituents |
Intensive properties | properties independent of the quantity or shape of the substance under consideration; for example, temperature, pressure, or composition. |
Gas | One of the three states of matter; has neither fixed shape nor fixed volume |
Liquid | one of the three states of matter; has a fixed volume but takes the shape of its container. |
Matter | The material of the universe; anything that has mass and occupies space. |
Molecule | a bonded collection of two or more atoms of the same element or different elements. |
Physical change | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
Physical properties | A characteristic of a substance that can be observed in the absence of change; that is, without the substance becoming a different substance. |
Reaction | a change or transformation in which a substance decomposes, combines with other substances, or interchanges constituents with other substances |
Solid | one of the three states of matter; has a fixed shape and volume. |
States of matter | The three different forms in which matter can exist: solid, liquid, and gas |