Shaillee Kaushal is teaching live on Unacademy Plus
XII 01 Solid State VIII
Packing of identical solid spheres Arrangement in two dimensions: In two dimensions two different arrangements can be shown Arrangement (i)
Close packing in three dimensions: Three dimensional closed packing is formed from square close packing in two dimensions.
Three dimensional close packing from two dimensional hexagonal close packed structure.
0 0 0 0 0 0
Hexagonal Close-Packed Structure (HCP another view) 14
Cubic close packing (ABCABC...)
Metals Mg, Zn, No, V, Cd Cu, Ag, Au, Ni, Pt fcc Li, Na, K, Rb, Cs, Ba Structure hcp ccp or bcc