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periodic table

salvador marquez

hi

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

Across
2.has an atomic number of 8
4.is in group 18 and period 1
5.rows of elements on the periodic table
7.has a atomic symbol of Rn
9.one or two letters which stand for the name of the element
12.the number of protons in an element
14.generally are poor conducters with a dull luster
15.the way a mineral reflects light
17.has a atomic symbol of Br
19.is in group 1 and period 2
20.the average mass of an atom of an element
Down
1.a chart that orginazes all known elements according to their properties
3.columns of elements on the periodic table
6.odorless and colorless elements that do not react easily with other elements
8.has a atomic number of 6
10.has an atomic number of 87
11.elements that have properties of both metals and non metals
13.generally are conductive with shiney luster and high density
16.the simplest form of matter made of the same type of atom
18.has and atomic number of 50

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