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Periodic Table

Brenda Ledezma

1
2          
 
  3
4                      
   
  5 6           7
8               9      
10      
    11                  
  12   13        
      14            
       
      15       16  
       
17                        
       
    18              
       
19              
 
 
 
20                  
 
21          

Across
2.the left of a bold stair step
4.the average mass of an atom
5.atomic # of 20
8.mass of 12
9.atomic number of 82
11.both metals and non-metals
12.symbal of Ar
14.atomic number of 29
15.the way a minaral reflects light
17.number of protons
18.first element on both period and group
19.mass of 28
20.the right of the bold stair line
21.symbal is Ag
Down
1.chart chart created in 1869 by Dmitri Mendeleeve
3.a column of elements
6.is one or 2 letters that represent the element
7.a row of elememts
10.odorless and colorless and low boiling point
13.mass of 197 and atomic # of 79
16.simplest form of matter

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