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18 Cards in this Set
- Front
- Back
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What is a chemical reaction?
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A process that changes and transforms one set of chemicals to another
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What is a reactant?
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Elements or compounds that enter a chemical reaction
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What is a product?
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Elements or compounds produced by a chemical reaction
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What makes up an atom?
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Proton +
Electron - Neutron (neutral) |
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What is the charge of an atom? and why?
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Neutral, because they have an equal number of protons and electrons
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What is an isotope?
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Atoms of the same element that differ in the # of neutrons they contain
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What are the uses for radioactive isotopes?
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The determine the age of rocks and fossils? They are used to kill bacteria that spoils food
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What are the three types of bonds? What are their differences?
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Covalent--electrons are shared between atoms
Chemical--atoms in compounds are held together ionic--when 1 or more electrons are transferred from 1 atom to another |
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What is a compound?
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A substance formed by the chemical combination of 2 or more elements
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What is the most abundant compound in living things?
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Water
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What does polar mean?
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Opposite
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What is a suspension?
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Solution of water and non-dissolvable materials. Example is blood.
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What is a solution?
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When ions become dispersed in water and formed a mixture.
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What does pH measure?
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Indicates the concentration of H+ ions in solution.
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What is the pH of an acid?
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1-6.9
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What is the pH of a base?
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7.1-14
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List examples of acidic substances?
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Stomach acid, lemon juice, tomato juice, acid rain, normal rainfall
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List examples of basic substances?
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human blood, sea water, soap, ammonia solution, bleach, oven cleaner
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