Multiple ChoiceWhich of the following pairs of elements are the most abundant in the continental crust?37views
Multiple ChoiceSince sodium (Na) is in period three of the periodic table, which of the following statements is correct about its electron configuration?34views
Multiple ChoiceWhich element is an excellent conductor of electricity and is commonly used in electrical wiring?41views
Multiple ChoiceWhich of the following statements correctly describes the first 36 elements of the periodic table?41views
Multiple ChoiceWhich of the following metals is classified as a transition metal on the periodic table?55views