1.vertical columns in the periodic table indicate what information? a. periods b. liquids c. synthetic elements d. groups and families 2.which of these are families of elements? a. metals and noble gases b. shells and nonmetals c. properties and rare earth elements d. metalloids and atoms 3.why is the atomic mass of many elements not a whole number? a. elements are unstable. b. an element may have isotopes with different numbers of neutrons. c. the atomic mass includes all the electrons. d. lsotopes are always expressed in decimals. 4.what's the maximum amount of electrons that will fit on an outermost shell of an atom? a.10 b.12 c.8 d.4 5.where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side 6.how are the properties of elements determined? a. by the outermost shell of electrons b. by the number of neutrons in an atom c. by the protons d. by the total number of atomic particles. 6.how are the properties of elements determined? a. by the outermost shell of electrons b. by the number of neutrons in an atom c. by the protons d. by the total number of atomic particles 7.where are most of the nonmetals found in the periodic table? a. at the top b. on the right side c. in the bottom left corner d. on the left side