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Periodic Table

Diana Gonzalez

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

Across
1.group 18 or 8A
4.a positively charged subatomic particle in the nucleus of an atom
6.a negatively charged subatomic particle found in the energy level of an atom
8.a horizontal row of elements in the periodic table
9.the elements thta are good conductors of heat and electricity
11.the center of an atom; made up of protons and neutrons
13.the number of protons in the nucleus of an atom
15.the elemnts that are usually poor conductors of heat and electricity
16.an electron in the outermost energy level of an atom
19.the smallest particle that has the properties of an element
20.an ion with a positive chage
Down
2.the weighted average of the masses of all naturally occuring isotopes
3.any of the possible energies an electron may have in an atom
5.a vertical column of elements in the periodic table
7.the total number of protons and neutrons in the nucleus of an atom
10.group 1 or 1A
12.another name for group
14.an element that has properties of both a metal and nonmetal
17.a neutral subatomic particle in the nucleus of an atom
18.an atom or a group of atoms that has lost or gained one or more electrons

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