Which of the following are incorrectly paired? Sr, alkaline earth metal Ir, transition metal OF, halogen...

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Question

Answer 1

Answer #1

Pb is wrongly mathced.Pb(lead) is not a transition metal as it has fully filled outer d orbital, it is a post transition metal.

Sr is alkaline earth metal as it is a group 2 element(same as Mg). All elements of group 2 are called alkaline earth metal.

Ir is a transition metal as it has incomplete filled d orbitals. 5d⁷6s²

F is a halogen as it belocngs to group 17. all eleemts of group 17 are called halogens.

Rb is ana alkali metal as it belongs to group 1.

Therefeore, the answer is Pb(lead).

Answer 2

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