Element E in a certain main-block group forms a compound with fluorine that has

Question

Element E in a certain main-block group forms a compound with fluorine that has the empirical formula EF 5 . This compound is a pale yellow toxic liquid that boils at about 100 °C . It reacts vigorously with water to produce a strongly acidic solution. 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 ".

Explanation / Answer

Element "E" may lie in international group number 5 or 15. Elements in these groups may create +5 cation to form EF5 product. Group 5 have Vanadium, Niobium, Tantalum, Dubnium. Group 15 has elements like Nitrogen, Phosphorus, Arsenic, Antimony, Bismuth.

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