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Atomic Structure



                    1                
                        2         3  
                                     
                                     
                                     
              4                      
                                     
          5                          
                                     
                  6                  
              7                      
8                                    
                      9              
  10                                  
                              11      
  12                                  
              13   14                  
                                     
                                     
                                     
                                     
              15                      
                                     
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2 A subatomic particle in an atom's nucleus that has a positive charge of 1+.
4 States that matter is composed of extremely small particles called atoms.
5 The number of protons plus neutrons in an atom.
7 Discovered the neutron
8 A negatively charged, particle with an extremely small mass has a charge of -1
10 this element has an atomic mass of 7.
12 Atoms of the same element with different numbers of neutrons.
13 Discovered the nuecleus and the proton
15 The smallest particle of an element that retains all the properties of that element.
1 this element has an atomic number of 2.
3 A subatomic particle in an atom's nucleus that has a positive charge of 0.
4 The number of protons in an atom.
5 a unit of mass, equal to 1/12 the mass of the carbon-12 atom and expresses the mass of atomic and subatomic particles.
6 It was his atomic theory
9 The extremely small, positively charged, dense center of an atom that contains positively charged protons and neutral neutrons.
11 this element has 6 protons and 6 neutrons.
14 Discovered the electron.
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