Multiple ChoiceWhich element is located in Group 2 (alkaline earth metals) and Period 3 of the periodic table?1views
Multiple ChoiceWhich of the following is a representative element, found in the 3rd Period, that is also a pnictogen.1854views10rank
Multiple ChoiceAn element has 25 electrons (i.e., atomic number 25). Which classification best describes this element in the periodic table?
Multiple ChoiceWhich description best defines a main-group (representative) element on the periodic table?1views
Multiple ChoiceWhich Period 3 element is least likely to react naturally because it is a noble gas with a full valence shell?1views