Chem-Module 16
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| Oxidation number | The charge that an atom in a molecule would develop if the most electronegative atoms in the molecule took the shared electrons from the less electronegative atoms
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| By calculating oxidation numbers, you are actually calculating ______ charge on the atoms in a molecule assuming that the electrons were not share not were transferred from one atom to another. | possible
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| The sum of all oxidation numbers in a molecule must equal the ______ of that molecule | charge
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| When a substance has only one type of atom in it (F2, O3, Ca 2+ , or Mg for example) the oxidation number for that atom is _____ to the charge of the substance _______ by the number of atoms present. | equal, divided
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| Group 1A metals (Li, Na, K, Rb, Cs, and Fr) always have oxidation numbers of ____ in molecules that contain more than one type of atom. | +1
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| Group 2A metals (Be, Mg, Ca, Sr, Ba and Ra) always have oxidation numbers of ___ in molecules that contain more than one type of atom. | +2
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| Fluorine always has a ___ oxidation number in molecules that contain more than one type of atom. | -1
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| When grouped with just one other atom that happens to be a metal, H has an oxidation number of ____. In all other cases in which it is grouped with other atoms, H has an oxidation number of _____. | -1, +1
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| Oxygen has an oxidation number of ____ in molecules that contain more than one type of atom . | -2
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| If all else fails, assume that the atom's oxidation number is the same as what it would take on in an __________ __________ . The atoms that are most likely to follow this rule are in groups 3A, 6A, and 7A. | ionic compound
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| Oxidation | The process by which an atoms loses electrons
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| Reduction | The process by which an atom gains electrons
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| LEO says GER | Lose Electron Oxidation (says) Gain Electrons Reduction
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| When a redox reaction occurs there will always be one atom that is _______ and one atom that is _______. | oxidized, reduced
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| Electricity is just | electrons traveling through a wire.
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| Negative side of a battery | Anode
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| Positive side of a battery | Cathod
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| Negative ions | Anions
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| Positive ions | Cations
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| A battery can also be called a | Galvanic cell
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| Battery in an automobile | Lead-acid battery
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