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1 Ch - Phy Sci M 5A

Apologia Physical Science Module 5A

QuestionAnswer
binary compounds compounds made of only two elements
polyatomic ion a covalently bonded group of atoms that has a positive or negative charge and acts as a unit
synthesis reaction a chemical reaction in which two or more substances react to form a single compound
decomposition reaction a chemical reaction in which a compound breaks down into two or more simpler substances
single replacement reaction a chemical reaction in which one element takes that place of another element in a compound
sodium chloride an example of how a binary ionic compound is named
Alkali metals, alkaline earth metals, and aluminum all form cations with positive charges equal to their group number.
Many transition metals in the B groups form more than one type of ion.
When a metal forms more than one cation, the name of the cation contains a Roman numeral to indicate the charge of the ion [Ex: iron (II) oxide]
Polyatomic ions have their own naming system.
Polyatomic ions that end in -ite have _________than those with the same name that end with -ate. one less oxygen atom
molecular compounds formed when atoms SHARE electrons in covalent bonds
Molecular compounds are usually formed between nonmetals.
Naming molecular compounds is similar to naming ionic compounds, except prefixes are used before the name of the 2nd element & sometimes before the name of the 1st element.
diphosphorus pentachloride & dinitrogen monosulfide examples of how molecular compounds are named
Chemical reactions can generally be classified as synthesis, decomposition, single replacement, double replacement, or combustion reactions.
When two reactants join to form a new product, it is a synthesis reaction even if one or both of the reactants are compounds.
Decomposition reactions are the ____________ of synthesis reactions. opposite
A reactant compound is decomposed when a form of ___________ is added. energy (light, heat, electricity, etc.)
water electrolysis decomposition that occurs when electricity passes through water
Created by: MrsHough
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