Question

Do all metals posses a close packed structure

Answer 1

heya @user
here is your answer

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No, All metals do not possess a close packed structure. 

the metals which structure are CCP (Cubic Close Packed ) , FCC (Face Centred Cubic) and HCP (Hexagonal Close Packed) only can exhibit in closed pack structure

eg - aluminum, zinc etc

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Hope helped !!

Answer 2

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All metals do not possess a close packed structure. Only those structure which cystallise either in a Cubic Close Packed (ccp), also referred to as fcc or Face Centred Cubic, or in a Hexagonal Close Packed (hcp) arrangement exhibit close packed structures. ccp examples are - aluminium, gold, nickel, lead, copper, etc.