Multiple ChoiceWhich element did Dmitri Mendeleev predict to exist before it was discovered, referring to it as 'eka-silicon'?48views
Multiple ChoiceBased on its location in the periodic table, which of the following elements is classified as a metalloid?47views
Multiple ChoiceWhich of the following elements is the most commonly recognized metalloid on the periodic table?48views
Multiple ChoiceWhich of the following pairs of elements exhibits the most striking difference in their chemical properties due to their classification on the periodic table?44views
Multiple ChoiceWhich of the following elements is classified as a metalloid in the periodic table?42views
Multiple ChoiceWhich of the following elements is classified as a metalloid on the periodic table?46views
Multiple ChoiceWhich of the following elements is classified as a nonmetal on the periodic table?43views
Multiple ChoiceWhy did early scientists arrange the periodic table by atomic mass rather than atomic number?55views