Ww 2.1 Crossword
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
                      
 
 
Down: 1) In the nucleus, has a charge of +1 and a mass of 1amu.2) The amount of energy eneded to melt a substance (solid to liquid)5) the same element (same number of protons) that has a different mass (different neutrons) Across: 3) Outide the nucleus, has a charge of -1 and a mass of approximately 0 amu.4) The center of an atom that contains protons and neutrons. Is dense and has a positive charge.6) The amount of energy needed to vaporize a substance (liquid to gas).7) Gases are in a random, straight-line motion; the collisions are elastic; has neglible volume; weak or no intermolecular forces (no attraction)8) In the nucleus, has a charge of 0 and a mass of 1 amu.
 

 

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