1) What do we mean by "periods" in the periodic table a) Rows b) group c) columns d) family e) list f) time 2) What do we mean by "group" in the periodic table a) Rows b) columns c) people d) elements e) list 3) What does group share in common  a) same properties  b) same atomic number c) same atomic weight d) same color e) same properties and number of valence electrons 4) What does period share in common a) same properties b) same atomic number c) same atomic weight d) same capacity  e) the same number of electron shells 5) the number of electrons that stay in the outer shell is definition of a) atomic weight b) electron shells c) valence electrons d) volume e) density

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