AB AB ____________type of packing is called ________whereas ABCABC __________type of packing is called ___________

AB AB ____________type of packing is called ________whereas ABCABC ___

1.	AB AB ____________type of packing is called ________whereas ABCABC __________type of packing is called ___________
Answer» ANSWER :HEXAGONAL CLOSE PACKING , CUBIC close packing