1027 Compounds and Chemical Reactions

1027 Compounds and Chemical Reactions - Compounds and...

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Compounds and Chemical Reactions
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Chemical Formulas Ionic Compounds Chemical formulas are used to represent atoms that are present in a compound. It is a shorthand for writing the name of the compound. 2 Ca(NO 3 ) 2 The subscript represent the numbers of each atom present in the formula. The subscript 3 inside parenthesis represent 3 oxygen atoms The subscript 2 outside parenthesis multiplies the nitrogen and oxygen in the parenthesis only 2 nitrogen atoms and 6 oxygen atoms The 2 in front of the formula is a multiplier as in mathematics (coefficient). It represents the number of formula units
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Ionic Compounds-Charge Balance The formula of an ionic compound shows the number and kinds of ions that make up the ionic compound. An ionic compound is composed of cations and anions The algebraic sum of the ionic charges in the formula is equal to zero
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Monatomic Ions Monatomic ions are single atoms that have lost or gained electrons resulting in a charges particle. (These ions are found in the charts below.) Polyatomic ions contain two or more atoms that have an electric charge.
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Valence Electrons Electrons are arranged in prescribed fashion around the nucleus They are arranged in shells
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1027 Compounds and Chemical Reactions - Compounds and...

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