Question

Question 6 Element E in a certain main-block group forms a compound with fluorine that has the empirical formula EF2. This compound is a white solid that melts at about 1400°C and boils at about 2500°C. It conducts electricity in the molten state. It's insoluble in water. In which groups of the Periodic Table does element E probably lie? Enter the group labels below. For example, if E is probably in Group 1A (the alkali metals) or Group 8A (the noble gases), enter "1A, 8A" or the international group numbers "1, 18". Note: you may assume E is neither hydrogen nor a p-block metal.