Ch 3 Atomic Structure Vocab Quiz Crossword
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
                                
 
 
Down: 1) Sum of the number of protons and neutrons in the necleus of a given atom.2) Number of protons in the nucleus.4) All atoms of a given element are identical, but they differ from those of any other element.7) Carries no negative charge.8) Weighted average of the masses of the existing isotopes of an element.9) Smallest particle of an element that retains the chemical identity of the element.11) Carries the positive charge of the nucleus.14) Describes the changes that occur during radioactivity decay. Across: 3) Process that changes the composistion of the nucleus of an atom.5) A given compound always contains the same elements in the same proportions by mass.6) Attractive force among the particles in the nucleus of an atom; in a stable atom, it overcomes the force of repulsion among protons.10) Negativly charged particles.12) Atom or group of atoms that has a positive or negative charge because it has lost or gained electrons.13) Atom that has the same number of protons as another atom, but that has a different number of neutrons.14) Lies in the center of the cell of the atom and electrons move in the space around it.15) Negatively charged electrode.16) Spontanious breakdown of an unstable atomic nucleus, during which alpha particles, beta particles, and gamma rays may be emitted.17) A stream of charged particles flows from cathode to the anode in _______.18) The spontaneous emission of radiation from element.19) Unit by which the mass of an atom or atomic particle is expressed.
 

 

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