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Chemistry QII:QI
Oxidation Numbers, Polyions
Question | Answer |
---|---|
a number used to represent the number of electrons lost, gained, or shared in a chemical change | oxidation number |
unreacted elements have oxidation numbers equal to _____ | zero |
atoms in ionic compounds that lose electrons have ____ oxidation numbers | positive |
atoms in ionic compounds that gain electrons have ____ oxidation numbers | negative |
in a nonpolar covalent diatomic molecule, each atom has an oxidation number of _____ | zero |
name the 7 diatomic molecules | H, O, N, F, Cl, Br, I |
an atomic symbol represents (3) | the name of the element, one atom of the element, the atomic mass of the element |
aluminum | Al |
argon | Ar |
bromine | Br |
calcium | Ca |
Carbon | C |
Chlorine | Cl |
Copper | Cu |
Fluorine | F |
Helium | He |
Hydrogen | H |
Iodine | I |
Iron | Fe |
Magnesium | Mg |
Manganese | Mn |
Mercury | Hg |
Neon | Ne |
Nitrogen | N |
Oxygen | O |
Phosphorus | P |
Potassium | K |
Silver | Ag |
Sodium | Na |
Sulfur | S |
Zinc | Zn |
a qualitative and quantitative expression of a compound using symbols and subscripts to indicate the chemical constituents and their respective numbers | formula |
the abbreviation for a compound | formula |
two or more elements chemically combined in a definite proportion by mass | compound |
written above and to the right of the symbol, represent the oxidation number | superscript |
written below and to the right of the symbol, represents the definite proportion by which the atoms combine | subscript |
a group of atoms that act as a unit a possess a charge | polyatomic ion |
when naming polyatomic ions, the ____ atom goes first | positive |
ammonium ion | (NH4)+1 |
bicarbonate ion | (HCO3)-1 |
cyanide ion | (CN)-1 |
hydroxide ion | (OH)-1 |
hypochlorite ion | (OCl)-1 |
nitrate ion | (NO3)-1 |
nitrite ion | (NO2)-1 |
carbonate ion | (CO3)-2 |
sulfate ion | (SO4)-2 |
sulfite ion | (SO3)-2 |
phosphate ion | (PO4)-3 |