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Stefania Saraiva's cards
chapters 6 & 7 flash cards
22
Chemistry
8th Grade
01/31/2010

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Chapter 6 Flash Cards

 

 

 

 

Definition
Term
Anion
Definition

An ion with a negative charge

 

Term

True or False:

The lower the ionization energy the easier it is to remove an electron from an atom

Definition
True
Term
An ionoc bond froms when _________ are transferred from one atom to another
Definition
electrons
Term
Two factors that determine the arrangement of ions in an ionic crystal 
Definition

  1. The ratio of ions
  2. The relative sizes of the ions

Term

True or false:

In a water molecule, the hydrogen side of the molecule has a partial possitve charge, and the oxygen side has a partial negative charge.

Definition
true
Term
When atoms form a polar covalent bond, the atom with the greater attraction for electrons has a partial _______ charge
Definition
negative
Term
Binary
Definition
describes a compound made from only two elements 
Term

True or False:

names of anions are formed by placing the suffix -ide after part of the name of the nonmetal.

Definition
true
Term
two properties of metals that can be explained by mettalic bonding
Definition

  1. malleability
  2. ability to conduct and electric current

Term

Carbon

Iron

Definition
two elements that all types of steel contain
Term

 

 

 

 

Chapter 7 Flash Cards


Definition
Term

True or false:

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Definition
true
Term
Chemists use a counting unit called a(n)________ to measure amounts of a substance because chemical reactions often involve large numbers of small particles
Definition
mole
Term

True or False:

A composition reaction is the opposite of a synthesis reaction

Definition
true
Term
reduction
Definition
The process in which an element gains electrons during a chemical reaction 
Term
In a chemical reaction, energy is either released or __________
Definition
absorbed
Term
Exothermic reaction
Definition
a chemical reaction that releases energy to its surroundings
Term
any change that happens over time can be expressed as a(n) _________
Definition

rate

Term

True or False:

increasing the consentration of the reactants will generally slow down a chemical reaction

Definition
false
Term
equilibrium
Definition
a state in which the forward and reverse paths of a change take place at the same rate.
Term

True or False:

A change in reaction conditions does not affect a chemical equilibrium

Definition
false
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