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Question is

State whether the following statements are True or False:

A.

All the transition elements have unfilled d-orbitals.

B.

Iron belongs to 3d series of transition elements.

C.

Ferric iron has a half-filled 3d subshell.

D.

Steel is an interstitial compound.

E.

Zn, Cd, Hg are not considered as true transition metals as their d subshell is full.

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