Term
Physical Properties [image] |
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Definition
| properties that can be observed without changing the chemical structure of the substance. Include colour, density and electrical conductivity |
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Term
Chemical Properties [image] |
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Definition
describes a possible chemical change that a substance may undergo. A chemical change will produce a new substance with a different set of physical properties. |
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| two or more substances are put together but are not chemically combined. IE water with concentrated juice |
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Definition
are identical in properties no matter what the sample. IE table sugar |
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Definition
| substances that can not be broken down into simpler material. Are found on the periodic table |
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Definition
| The smallest particles of an element that can exist by themselves. |
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| Substances that are formed from two or more elements. The elements are always combined in the same fixed proportion. IE ammonia is 1 nitrogen and 3 hydrogen |
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Term
Subatomic Particles [image] |
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Definition
| atoms are made up of three very small particles called subatomic. They include protons, neutrons and electrons. |
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Definition
| the dense centre of the atom. It contains the positively charged protons and the the uncharged neutrons. |
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Definition
| a positively charged subatomic particle contained within the nucleus of an atom; has an electric chrage of +1; is stable when outside of the nucleus |
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Definition
| an uncharged subatomic particle contained within the nucleus of an atom; similar in mass to a proton |
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Definition
| the total number of protons and neutrons in the nucleus. The number is written after the element's name |
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Definition
| the average mass of the atoms of the element. It is measured in units called atomic mass units and given the symbol "u" |
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Definition
| Negatively charged particles that are found outside of the nucleus. They have the same strength as a proton. |
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| a specific region around the nucleus in which electrons are arranged; also called an orbital or an energy level. |
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Term
Unpaired Electrons [image] |
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Definition
| a single electron in a shell |
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Definition
| 2 electrons together in an electron shell |
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Definition
| groups of elements that have characteristic sets of common physical and chemical properties. The compounds formed from elements within a family are very similar in their physical properties. |
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