Question

compound formed when am element, A of group 2 combines with an element, B of group seventeen.​

Answer 1

Answer:

All the elements under group 2 will have 2 electrons in the outermost shell i.e valency = 2

Similarly, elements under group 17 will have 7 electrons in the outermost shell i.e valency = 1

By criss cross method

the compound formed = $<strong> </strong>AB_{2}$

Example: $BeCl_{2}$