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| All matter is made of ____, which may combine to form ______. |
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Definition
| All matter is made of atoms, which may combine to form molecules. |
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| A solution of two or more metals, which has properties of its own. Examples of alloys are steel and bronze. |
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| An arrangement of objects in rows and columns. |
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| The smallest particle of an element that has the chemical properties of that element. |
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| The number of protons in the nucleus of an atom. |
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| The temperature at which a liquid changes to a gas or vapors. |
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| Characteristics of matter that describes how it changes when it reacts with other matter. |
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| A change in the arrangement of the atoms or molecules that come into contact with each other. This rearrangement causes one or more new substances to come into being. |
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| A substance made up of two or more elements that are chemically combined. For example, carbon dioxide is a compound that is chemically combined. |
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| A substance made up of two or more elements that are chemically combined. |
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| A material of an object through which heat, electricty, light, or sound can flow easily. Silver (Ag) and copper (Cu) are some of the most efficient metals and are often used in electronics. |
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| Differences in chemical and ___ properties of substances are used to separate mixtures and identify compounds. |
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Definition
| Differences in chemical and physical properties of substances are used to separate mixtures and identify compounds. |
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| Easily molded or shaped without breaking into pieces. |
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| During chemical reactions the ____ in the reactants rearrange for form products with different ___. |
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Definition
| During chemical reactions the atoms in the reactants rearrange for form products with different properties. |
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| Ability to conduct electricity. |
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| A very powerful microscope that uses a beam of electrons, instead of light, to magnify objects that are too small to be seen with an ordinary microscope. |
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| A substance that cannot be broken down into other substance. |
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| The temperature at which a liquid becomes a solid. |
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| One of the three basic forms of matter. The molecules of a gas are constantly moving about. |
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| One of the three basic forms of matter. Liquids are made up of molecules that can move short distances. |
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Term
| Living organisms and most materials are composed of just a few ____. |
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Definition
| Living organisms and most materials are composed of just a few elements. |
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| Capable of being shaped or formed, especially by pressure or hammering. |
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| One of a large group of chemical elements that heat and electricity can easily move through. About 80% of the known elements are metals. |
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Definition
| One of a large group of chemical elements that heat and electricity can easily move through. |
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| A combination of two or more substances that can be separated by physical means. |
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| A particle made up of a group of atoms that are chemically bonded. A molecule of water contains two hydrogen atoms and one oxygen atom. |
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| One of a group of chemical elements that do not conduct heat or electricity well. |
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| A table that arranges all the chemical elements in rows called periods and columns called groups. |
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| The compound as a result of a chemical reaction. |
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| A chemical element or a chemical compound that takes part in a chemical reaction. |
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Definition
| Responsiveness to a chemical reaction. |
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| A compound that can be formed when an acid reacts with a base. Table salt is a compound of sodium and chlorine. |
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Term
| Scanning Electrom Microscope |
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Definition
| An electrom microscope that makes a three-dimensional image by shooting a stream of electroms at an object and moving the stream across it. |
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Definition
| One of three basic forms of matter. Solids are made up of molecules that can vibrate back and forth but can't move to change places with other molecules. |
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| The ability to be dissolved. |
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| The process of changing from a solid to a gas, or from a gas to a solid, without turning into a liquid first. |
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| A written sign that stands for something else. |
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| Ability to conduct or transwer heat. |
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| You should know that each element is made of ___ kind of atom and that the elements are organized in the periodic table by their ______ properties. |
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Definition
| You should know that each element is made of one kind of atom and that the elements are organized in the periodic table by their chemical properties. |
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