1.
Alkali earth metals are __________ than alkali metals.A) less reactive B) just as reactive C) less shiny D) more reactive 2.
Which gas is a noble gas?A) ozone B) oxygen C) hydrogen D) helium 3.
Hg is the symbol for __________.A) mercury B) hydrogen C) helium D) silver 4.
__________ is an alkali metal.A) Sodium B) Lead C) Magnesium D) Barium 5.
Moseley arranged his periodic table by increasing __________.A) hardness B) symbol C) atomic mass D) atomic number 6.
Halogens form __________ when mixed with alkali metals.A) acids B) noble gases C) salts D) gases 7.
Noble gases __________ react with other elements.A) seldom B) do not C) always D) violently 8.
Lanthanides are __________.A) easily confused with other metals B) similar to each other C) different from each other D) nonmetals 9.
The iron triad has __________ properties.A) no chemical B) nonmetallic C) unusual D) magnetic 10.
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 11.
Mendeleev arranged families of elements __________ in his periodic table.A) circularly B) diagonally C) horizontally D) vertically 12.
Which elements are essential for life?A) nitrogen and phosphorus B) uranium and plutonium C) mercury and lead D) gold and silver 13.
Mendeleev arranged the elements in his periodic table by increasing __________.A) atomic mass B) atomic number C) hardness D) symbol 14.
What is a common property of transition metals?A) high melting point B) low boiling point C) soft D) brittle 15.
The __________ contains the name, atomic number, symbol, and atomic mass of an element.A) property B) bull's eye C) letter D) element key 16.
Silicon exists in the __________ group.A) boron B) metal C) carbon D) noble 17.
According to the periodic table, iodine will have similar chemical and physical properties to which element?A) oxygen B) carbon C) sodium D) bromine 18.
Sulfuric acid contains which elements?A) sulfur, oxygen, and hydrogen B) sulfur, nitrogen, and phosphorus C) sulfur, helium, and hydrogen D) sulfur, nitrogen, and oxygen 19.
Which element is a gas at room temperature?A) carbon B) hydrogen C) gold D) mercury 20.
Iron in hemoglobin transports __________ in the blood.A) hydrogen B) helium C) carbon dioxide D) oxygen