A metal (M), shows ABAB arrangement of atoms in solid state, then what is the relatin between radius of atom (r) and edge length (a) and height (c) of HCP unit cell

A metal (M), shows ABAB arrangement of atoms in solid state, then what

1.	A metal (M), shows ABAB arrangement of atoms in solid state, then what is the relatin between radius of atom (r) and edge length (a) and height (c) of HCP unit cell
Answer» `a = 2R` `C = (sqrt((2)/(3)))4r` `c = (sqrt((3)/(2)))4r` `a = (2sqrt2)R` SOLUTION :`a = 2R, c = sqrt((2)/(3)) 2a = sqrt((2)/(3)) 4r`