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Daniel's Ch.6 & Ch.7
Daniel Pareja's Ch.6 & Ch.7
20
Science
8th Grade
02/04/2010

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Cards

Term
How is an ion with a negative charge called?
Definition
Anion
Term
What 2 things determine the arrangement of ions in an ionic crystals?
Definition
The ratio of ions & the relative size of ions
Term
What's a Covalent bond?
Definition
A chemical bond in which two atoms share a pair of valence electrons
Term
In a covalent bond, the atoms are held together by the attractions between what?
Definition
The shared electrons and the protons in each nucleus
Term
How is a compound made from only 2 elements called?
Definition
Binary
Term
The total charges on the cations and anions in the formula of
an ionic compound must add up to what?
Definition
Zero
Term
How many ammonium ions are needed to create a compound with one phosphate ion?
Definition
Three
Term
The properties of a metal are
related to what?
Definition
To the bonds inside the metal
Term
What is an alloy
Definition
a mixture of 2 or more element, with at least one metal
Term
What 2 elements do all types of steel contain?
Definition
Carbon and Iron
Term
What is the force that holds atoms or ions together?
Definition
bonds
Term
What are new substances produced in a chemical reaction called?
Definition
Products
Term
What are the numbers that appear before the formulas in a chemical equation called?
Definition
Coefficents
Term
How many types of chemical reactions are there? What are they?
Definition
5;Synthesis, decomposition, single replacement, double replacement, and combustion
Term
What is an oxidation-reduction reaction?
Definition
A reaction in which electrons are transferred from one reactant to another
Term
What is the process in which an element gains electrons during a chemical reaction called?
Definition
Reduction
Term
A change over time can be expressed as a what?
Definition
A rate
Term
What is a catalyst?
Definition
A substance that affects the rate of a reaction without being used for the actual reaction
Term
What is equilibrium?
Definition
A state in which the forward and reverse paths of a change take place at the same rate
Term
What is a reaction that releases energy called?
Definition
Exothermic
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