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Definition
| A pure substance that cannot be separated or broken down into simpler substances by physical or chemical mean |
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| Elements that are shiny and are good conductors of thermal energy and electric current most metals are malleable and ductile |
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| Elements that are dull and are poor conductors of thermal energy and electric current |
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| Elements that have properties of both metals and nonmetals sometimes referred as semiconductors |
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| The ability of a substance to be pounded into thin sheets |
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| The ability of a substance to be drawn or pulled into wire |
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| A pure substance composed of two or more elements that are chemically combined |
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| A combination of two or more substances that are not chemically combined |
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| A mixture that appears to be a single substance but is composed of particles of two or more substances that are distributed evenly amongst each other |
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Definition
| The smallest particle into which an element can be divided and still be the same substance |
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| The negatively charged particles found in all atoms electrons are involved in the formation of chemical bonds |
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Definition
| The particles of the nucleus that have no charge |
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| The positively charged particles of the nucleus the number of protons in a nucleus is the atomic number and determines the identity of an element |
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| The tiny extremly dense positively charged region in the center of an atom made up of protons and neutrons |
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| The regions inside an atom where electrons are likely to be found |
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| The number of protons in the nucleus of an atom |
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Definition
| the weighted average of the masses of all the naturally occurring isotopes of an element |
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