Chem chapter 5 study guide

Chem chapter 5 study guide - Law of constant composition:...

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All samples of a given compound have the same proportions of their constituent elements. Chemical formulas: Indicate the elements present in the compound and the relative # of atoms of each Ex. H 2O = the element for water [ 2:1 ratio, Subscripts: In a chem. . form. represent the relative # of ea type of atom in a chem. compound; they do not change. Chemical formulas: List the most metallic element first Polyatomic ions: Are grps of atoms w/ an overall charge. They are the charged grps. When there is more than 1 polyatomic ion in a chem. form., the polyatomic ion is set off in parentheses. The subscript outside the parentheses indicates the # of polyatomic ions in the formula. Ex. Al(C 2 H 3 O 2 )s = atoms in chem. form. A pure substance: Elements may be atomic or molecular. Atomic elements exist w/ single atoms as the basic unit. Molecular elements exist as diatomic molecules in which 2 atoms are bonded together. Ex. H composed of H atoms, Ex. H = H
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This note was uploaded on 03/24/2012 for the course CHEM 101 taught by Professor Brennan,b during the Spring '08 term at Santa Barbara City.

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Chem chapter 5 study guide - Law of constant composition:...

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