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The Chemical Earth
Module 8.2
8
Chemistry
11th Grade
07/23/2010

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Cards

Term
What is Chemistry?
Definition
Chemistry deals with the structure, properties and reactions of matter
Term
Identify the difference between elements, compounds and mixtures in terms of the particle theory. 
Definition
elements insist of one kind of atom only, compounds are 2 or more different elements chemically bonded together and a mixture is 2 or more different elements or compounds physically interacted . 
Term
What are homogeneous and heterogeneous substances?  
Definition

Homogeneous substances- has the same type and distribution of particles throughout the definite composition  

Heterogeneous Substances- are not the same in composition and properties 

Term
What are the State of Matter
Definition

Solid

Liquid

Gas

Term
What is the difference between physical and chemical properties of elements, compounds and mixtures? 
Definition

Physical properties of something are readily observation.

Chemical properties are the chemical reactions.

Term
Describe atoms in terms of mass number and atomic number
Definition
The weight of an Atom is found in the mass number and is the number of protons and neutrons together. The atomic number is the number of protons and the number of electrons found in the shells.  The amount of neutrons is found by taken the mass number away from the atomic number. 
Term
Some trends in the periodic table.
Definition

- moving across the period the is a decrease in atomic radius

-An increase in ionisation across each period.

-Across period there is an increase in electrongrativity , down a group a decrease

 

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