Science words Crossword
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
                       
 
 
Down: 1) elements in same column2) average mass of isotopes4) lacks properties of metal5) atom with same # o protons/different # neutrons from other atoms6) particle no charge 9) # of protons in nucleus10) class of elements11) row of elements Across: 3) positive particle in nucleus7) sum of protons + neutrons in nucleus8) characteristics of previous 212) negative particle outside nucleus13) basic particle which elements made14) level of energy electron has15) core of atom
 

 

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