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Definition
| a bond which forms when atoms transfer or share electrons |
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Definition
| a bond which forms when electrons are transferred |
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| a bond which forms when atoms share electrons |
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| an atom which loses or gains one or more electrons so that it becomes charged |
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Definition
| occurs when one or more electrons are lost by an atom |
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Definition
| occurs when one or more electrons are gained by an atom |
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| a system of chemical changes that involves breaking and reforming of chemical bonds to form new substances |
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Definition
| one of the starting materials of a chemical reaction |
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Definition
| one of the materials formed from a chemical reaction |
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Definition
| an abbreviated way to show the exact numbers of atoms and molecules involved in a chemical reaction |
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Definition
| the mass of the reactants must be equal to the mass of the products in any chemical reaction |
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Definition
| the energy needed to break chemical bonds in the reactants |
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Definition
| The result is heat is released during a chemical reaction because less energy is required to break the bonds in the reactants than to form the bonds in the products. |
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Definition
| The result is heat is absorbed during a chemical reaction because more energy is required to break the bonds in the reactants than to form the bonds in the products. |
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Term
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Definition
| splitting the nucleus of an atom OR combining the nuclei of 2 atoms. |
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Definition
| occurs when the fission reaction of a single atom triggers more nuclear reactions and results in a continuous release of nuclear energy |
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Definition
| when the nucleus emits radiation in the form of particles and energy until it can become stable |
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Definition
| the spontaneous break down of a material with the release of radiation |
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Definition
| the length of time it takes for half an amount of a radioactive substance to decay |
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Definition
| radioactive decay which resluts in an alpha particle (a helium nucleus) released |
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Definition
| radioactive decay which results in a beta particle (an electron) being released |
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Definition
| radioactive decay which results in a gamma ray (high energy photon) being released |
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| 1/8 of the substance will remain |
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Definition
| How much of a substance will be left after 3 half-lives have occurred? |
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Term
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Definition
| If a substance has a half-life of 3 days, how many half-lives have passed if 1/4 of the original substance remains? |
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Term
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Definition
| nuclear reaction in which the nucleus of an atom is split into smaller pieces |
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Term
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Definition
| a nuclear reaction in which the nuclei of two atoms are joined, releasing an incredible amount of energy |
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