1 Mendeleev arranged families of elements __________ in his periodic table.A) circularly B) vertically C) diagonally D) horizontally 2 Lanthanides are __________.A) similar to each other B) nonmetals C) easily confused with other metals D) different from each other 3 From left to right, what are the order of zones on a periodic table?A) metalloids, metals, and nonmetals B) metals, nonmetals, and metalloids C) metals, metalloids, and nonmetals D) nonmetals, metalloids, and metals 4 Which elements are essential for life?A) uranium and plutonium B) nitrogen and phosphorus C) gold and silver D) mercury and lead 5 According to the periodic table, iodine will have similar chemical and physical properties to which element?A) carbon B) oxygen C) sodium D) bromine 6 Mendeleev arranged the elements in his periodic table by increasing __________.A) atomic number B) symbol C) hardness D) atomic mass 7 Which gas is a noble gas?A) helium B) hydrogen C) oxygen D) ozone 8 What is a common property of transition metals?A) low boiling point B) soft C) brittle D) high melting point 9 Elements used in dentistry include __________.A) lead, silver, and mercury B) silver, gold, and platinum C) fluorine, chlorine, and bromine D) silver, fluorine, and mercury 10 Alkali earth metals are __________ than alkali metals.A) just as reactive B) less reactive C) less shiny D) more reactive 11 The __________ contains the name, atomic number, symbol, and atomic mass of an element.A) bulls eye B) element key C) property D) letter 12 Which element is a gas at room temperature?A) hydrogen B) carbon C) gold D) mercury 13 Moseley arranged his periodic table by increasing __________.A) hardness B) atomic number C) atomic mass D) symbol 14 A(n) __________ of elements on the modern periodic table contains elements with similar chemical and physical properties.A) group B) zone C) family D) area 15 The iron triad has __________ properties.A) no chemical B) magnetic C) unusual D) nonmetallic 16 A substance that can make something happen faster but is not changed itself is a __________.A) catalyst B) platinum C) metal D) gas 17 Noble gases __________ react with other elements.A) always B) do not C) seldom D) violently 18 All actinides are __________.A) nonmetals B) radioactive C) gases D) non reactive 19 What is a common property of nonmetals?A) shininess B) malleability C) poor conductors D) ductility 20 Halogens form __________ when mixed with alkali metals.A) acids B) noble gases C) salts D) gases