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Definition
| the smallest particle (piece) of an element that still has all the properties of the element. It is composed of protons, neutrons, and electrons |
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| Change of state (or phase change) |
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Definition
| the changing of matter from a solid to a liquid, from a liquid to a gas, a gas back to a liquid, or a liquid back to a solid. |
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Definition
| the changing of matter into a different kind of matter with different properties. The actual molecules change and a new substance is formed |
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Definition
| a combination of two or more elements held together by chemical bonds that can not be seperated by physical means; the joining of two or more kinds of atoms into a molecule by a chemical reaction |
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Definition
| a negatively charged particle moving around the nucleus of an atom |
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Definition
| the basic building blocks of matter; a substance that cannot be broken down into a simpler substance; each one is made up of the same kind of atoms |
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Definition
| Able to be stretched thin into a wire; (the property of metal that allows it to be stretched into a wire) |
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Definition
| the amount of matter in an object |
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Definition
| anything that has mass and occupies space |
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Definition
| two or more substances that are mixed together but CAN be separated out because they are not chemically combined |
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Term
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Definition
| the smallest particle of a substance that that retains the chemical and physical properties of the substance and is made from two or more atoms |
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Definition
| a particle with no electrical charge in the nucleus (center) of an atom |
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Definition
| the center of an atom where the proton and neutrons are contained tightly packed together |
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Definition
| a change in the properties of matter without forming a different kind of matter; the look of the matter might change, but it still the same matter |
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Term
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Definition
| a positively charged particle in the nucleus of an atom; The number of these in an atom gives an atom its atomic number |
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Definition
| a mixture in which a substance breaks up into its most basic particles and spreads evenly through another substance |
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Term
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Definition
| the force that holds atoms together to form a molecule |
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Definition
| a combination of symbols of elements that represent a compound; for example NaCl is Sodium Chloride or salt |
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Term
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Definition
| capable of being shaped by beating with a hammer or pressing; one of the properties of metals |
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Definition
| able to transmit heat or electricity easily; one of the properties of metal |
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Term
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Definition
| one of the group of elements on the Periodic Table; these are malleable, ductile, and conductive. (They can be shaped, stretched, and they conduct heat and electricity) |
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Term
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Definition
| The elements on the Periodic Table that are brittle (not malleable or ductile), usually dull, and NOT good conductors |
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Term
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Definition
| The small number next to the symbol for an element that shows the nmber of atoms of that element is in a formula. The 2 in H2O. |
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Term
| Shells ( or energy levels) |
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Definition
| the electron paths in an atom |
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