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Chem-Module 16

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
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
The sum of all oxidation numbers in a molecule must equal the ______ of that molecule charge
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
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
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
Fluorine always has a ___ oxidation number in molecules that contain more than one type of atom. -1
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
Oxygen has an oxidation number of ____ in molecules that contain more than one type of atom . -2
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
Oxidation The process by which an atoms loses electrons
Reduction The process by which an atom gains electrons
LEO says GER Lose Electron Oxidation (says) Gain Electrons Reduction
When a redox reaction occurs there will always be one atom that is _______ and one atom that is _______. oxidized, reduced
Electricity is just electrons traveling through a wire.
Negative side of a battery Anode
Positive side of a battery Cathod
Negative ions Anions
Positive ions Cations
A battery can also be called a Galvanic cell
Battery in an automobile Lead-acid battery
Created by: akikoandpoog



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