The metal with greater density among calcium and strontium in FCC unit cells has to be found. Concept Introduction: FCC: In the face-centred cubic (FCC) cell, there will be six faces in a cube and the centre of each face has a lattice point. Apart from the six faces, there will be eight corners. One corner atom is shared by 8 unit cells and a face-centred atom is shared by 2 unit cells. The formula of density is: Density = Mass Volume From the formula of density, it is clear that the density is directly proportional to the mass. So, if the mass of a metal in FCC is greater, then its density will also be greater and vice versa.

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Chapter 12, Problem 12.120SP

Interpretation Introduction

Interpretation:

The metal with greater density among calcium and strontium in FCC unit cells has to be found.

Concept Introduction:

FCC:

In the face-centred cubic (FCC) cell, there will be six faces in a cube and the centre of each face has a lattice point. Apart from the six faces, there will be eight corners. One corner atom is shared by 8 unit cells and a face-centred atom is shared by 2 unit cells.

The formula of density is:

Density = MassVolume

From the formula of density, it is clear that the density is directly proportional to the mass. So, if the mass of a metal in FCC is greater, then its density will also be greater and vice versa.

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