Lesson E-2 (Science)  

created by Izzy927 on 29 Apr 12, enabled by jimmy
Medium level (73% of success)    12 questions - 76 players
Science Lesson E-2
 
1
A pure substance that cannot be broken down into any simpler pieces.
   
   
   
2
The smallest unit of an element that retains the properties of that element.
   
   
   
3
A particle in the nucleus of an atom that carries one unit of positive electric charge.
   
   
   
4
An atom's dense center where most of its masses are.
   
   
   
5
An atom's dense center where most of its masses are.
   
   
   
6
Any substance that is formed by a chemical combination of two or more elements and acts like a single substance (can only be broken down by a chemical reaction. )
   
   
   
7
A particle that contains more than on e atom joined together.
   
   
   
8
How is a compound different from an element?
   
   
   
9
Name 2 useful compounds
   
   
   
10
What is a chemical formula?
   
   
   
11
How are elements classified?
   
   
   
12
What is the periodic table?
   
   
   

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