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17 terms

CHEMICAL NAMES AND FORMULAS

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cation
any atom or group of atoms with a positive charge
molecular formula
shows the number and kinds of atoms present in the molecule of a compound
law of definite proportions
in any sample of the same chemical compound, the elements are always combined in the same proportion by mass.
ternary compound
a compound composed of three different elements
formula unit
the lowest whole-number ratio of ions in a compound
ionic compounds
compounds composed of of metal cations and nonmetal anions
law of multiple proportion
when two elements combine to form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers
polyatomic ion
tightly bound groups of atoms that behave as a unit and carry a charge
chemical formula
shows the kinds and numbers of atoms in the smallest representative unit of the substance
binary compound
a compound composed of two different elements
molecule
an electrically neutral group of atoms that act as a unit
ions
atoms or groups of atoms that have a positive or negative charge
the correct name for the N3- ion
nitride ion
Elements of group 4A
do not commonly form ions
3+
ionic charge on the chronium ion in the ionic compound Cr2O3
Formula for Calcium Hydrogen Phosphate
CaHPO4
compounds composed of ions
are generally crystalline solies at room temperature