Science 5 and 6 Crossword
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
 
 
Down: 1) mixture of two or more elements one is a metal2) group 1A, 1 valence electron, extremely reactive4) one twelth mass of a carbon 12 atom6) group 2A, 2 valence electrons, dif. in reactivity shown in way react with water8) each column on the periodic table9) bond in which electrons are not shared equally10) group 7A, seven valence electrons similar chemical properties11) chemical bond in which two atoms share a pair of valence electrons12) notation that shows what elements a compound contains and ration of atoms or ions of these elements in the compound14) ion with positive charge15) group 8A, eight valence electrons except helium18) neutral group of atoms joined together by one or more covalent bonds19) elements that are poor conductors of electric current21) ion with negative charge22) each row in table of elements24) atom that has positive or negative charge Across: 3) covalently bonded group of atoms that has a positive or negative charge and acts as a unit5) elements that are good conductors of electric current and heat7) electron in highest occupied energy level of atom13) pattern of repeating properties16) arrangement of elements in columns, based on set of properties that repeat from row to row17) solid whose particles are arranged in a lattice structure20) attraction between metal cation and shared electrons that surround it23) elements that form a bridge between the elements on the left side and right sides of table25) force that holds atoms or ions together as unit26) force that holds cations and anions together27) elements with properties that fall between those of metals and nonmetals28) model of atom in which each dot represents valence electron
 

 

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