1) Hydrogen is the ___ atom in the periodic table. a) lightest b) heavier c) heaviest 2) The lanthanide series contains some of the ___ metals. a) most reactive b) reactivest c) reactive 3) Nonmetals are the ___ conductors of heat and electricity. a) poorest b) most poor c) less poor 4) The periodic table is the ___ tool for chemists. a) more important b) most important c) importance 5) Metals are the ___ conductors of heat and electricity. a) best b) worst c) good 6) Noble gases are the ___ reactive elements. a) less b) least c) lesser 7) Actinides are the ___ unstable elements. a) most b) more c) much 8) Francium is the ___ naturally occurring element. a) rarer b) rarest c) most rare 9) Helium has the ___ atomic mass of all noble gases. a) lowest b) lower c) less 10) Tungsten has the ___ melting point of all metals. a) highest b) most high c) higher 11) Fluorine is the ___ electronegative element. a) most b) more c) much 12) Osmium is the ___ element. a) densest b) most dense c) more dense 13) Carbon is one of the ___ elements for life. a) essentialest b) more essential c) most essential 14) The alkali metals are the ___ reactive metals. a) most b) more c) very 15) Halogens are the ___ reactive nonmetals. a) most b) more c) less 16) Gold is one of the ___ metals. a) most malleable b) more malleable c) malleabler 17) Silver is the ___ conductor of electricity. a) good b) best c) better 18) The inert gases are the ___ elements. a) most stable b) least stable c) most unstable 19) Plutonium is one of the ___ radioactive elements. a) most dangerous b) safest c) dangerous 20) Diamond is the ___ natural substance. a) hardest b) sofest c) most shiny

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