객관식Which of the following is the name and symbol of the element in Group 4A of the periodic table?94views
객관식Which two groups on the periodic table are considered the most reactive, and what is the primary reason for their high reactivity?112views
객관식Which group of elements on the periodic table has the most similar chemical properties to lithium (Li)?110views
객관식Synthetic elements are primarily found in which of the following groups of the periodic table?128views