90) An alloy of Cu, Ag and Au is found to have copper constituting ccp lattice. If silver atoms occupy the edge centers and gold is present at body centers, the alloy has the formula:

Answer is:

Cu₄Ag₄Au

Answer is:

Answer is:

Explanation:

M = (d x a³ x N₀) ⁄ Z

Answer is:

The radius r⁺⁄r⁻ increases as coordination number increases

As the difference in the size of ions increases, coordination number increases

When coordination number is 8, the r⁺⁄r⁻ ratio lies between 0.225 and 0.414

In ionic solid of the type AX(ZnS, Wurtzite), the coordination number of Zn²⁺ and S²⁻ respectively are 4 and 4

Answer is: