Question 6 Element E in a certain main-block group forms a compound with fluorin

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.

Explanation / Answer

answer : 2A

Explanation :

the compound is CaF2. the melting and boiling points of CaF2 related to the given points.

The element belongs to 2A (alkaline earth metals) group.

2nd group metals form EF2 compounds. like CaF2 , MgF2 , BeF2. ... etc.

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