Science chp 8 Crossword
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
 
 
Down: 1) the s.i. unit used to express the masses of particles of an atom2) the number of protons in the nucleus in a atom3) the negatively charged particles found in all atoms; electrons are involved in the formation of chemical bonds5) the positively charged of the nucleus;the number of protons in the nucleus is the atomic number that determines the identity of an element 6) particles of a nucleus that have no charge7) smallest particle in which an element can be divided and still be the same substance Across: 4) a representation of an object or system8) a unifying explanation for a broad range of hypotheses and observation that have been supported by testing9) the region inside a atom where electrons are most likely to be found10) the weighted average the masses of the naturally occurring isotopes of an element11) the tiny extremely dense positively charged region in the center of an atom;made up of protons and electrons12) atoms that have the same number of protons but diffrent numbers of of nuetrons13) the sum of protons and neutrons in an atom
 

 

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