Which of the following is a characteristic of the lanthanides?A.They are all radioactive.B.They are used in making fireworks.C.They are silvery metals that conduct electricity.D.There are no known uses for the metals.

Which of the following is a lanthanide?A.Europium (Eu)B.Gold (Au)C.Barium (Ba)D.Americium (Am)

Identify which of the following properties are typical of the non-metal elements in period 3 of the periodic table. I.   They are poor conductors of both heat and electricity.II.  They form negative ions by gaining one or more electrons.III. They have high melting points and boiling points.

Which groups of the periodic table contains transition metals? And which periods contain lanthanides and actinides metals?1 pointGroups 3-12 contain transition metals, and periods 6 and 7 contain Lanthanides and actinides metalsGroups 1 and 2 contain transition metals, and periods 6 and 7 contain Lanthanides and actinides metalsGroups 13-18 contain transition metals, and periods 6 and 7 contain Lanthanides and actinides metalsGroups 3-12 contain transition metals, and periods 5 and 6 contain Lanthanides and actinides metals

What is the most common characteristic of all elements in the last column of the periodic table? Group of answer choicesThey all combine easily with one another.They all have a strong, distinctive odor.They are all good conductors of electricity.They are all non-reactive.

Which group on the periodic table contains chemical elements that are usually brittle as solids, shiny, and able to conduct electricity under certain conditions?A.MetalloidsB.NonmetalsC.MetalsD.Representative metals