Multiple ChoiceWhich group on the periodic table contains the element that has 5 valence electrons and is in period 3?33views
Multiple ChoiceWhich term refers to a set of elements in the periodic table that all have the same number of energy levels (principal shells) in their electron cloud?39views
Multiple ChoiceWhich of the following elements has chemical properties most similar to lithium?45views
Multiple ChoiceWhich of the following elements is a semimetal found in group 8A of the periodic table?57views