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Chemistry crossword

1 2
   
   
  3              
4                       5  
   
6    
7                         8
       
       
9                            
       
10        
         
       
11                        
       
       
12                                            
       
       
     
     
     
13                  

Across
3.when atoms share electrons
4.when electrons rise energy levels
7.law that elements repeat properties periodically when arranged by atomic number
9.when two metals bond together
11.rule that elements bond to get 8 valence electrons
12.when an atom has a full energy level
13.rule that the two electrons must have opposite spins in electron diagrams
Down
1.when one atom gives and one atom takes electrons
2.principle that two electrons are together in an electron diagram
5.Ability of an atom to attract other atoms electrons
6.made of covalent bonds
8.principle that electrons fill lowest electron energy level first
10.lowest energy level of an atom

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