`BaTiO_3` has pervoskite structure with `Ba^(2+)` ions at the corners,`O^(2-)` ions at the centre of each face and `Ti^(4+)` ions at the centre of a cubic cell. What is the no of `Ti^(4+)` ions nearest to `Ba^(2+)` ion?

Chromate ion, CrO_4^(2-) is

Why Zn^(2+) ions are colourless while Ni^(2+) ions are green and Cu^(2+) ions are blue in colour?

SiO_(4)^(4-) ion has geometry

A mineral is made of calcium ,titanium and oxygen Ca^(2+) ions located at corners , Ti^(4+) ions at the body -centre and O^(2-) ions face -centred of the unit cell. The molecular formula of the mineral is :

A cubic unit cell contains manganese ions at the corners and fluoride ions at the centre of each face. (a) What is the empirical formula ? (b) What is the C.N. of Mn^(2+) ion ? (c) Calculate the edge length of the unit cell if the radius of Mn^(2+) ion is 0.65Å and that of F^(-) ion is 1.36Å .

Let Mg TiO_(3) exists in pervoskite structure. In this lattice, all the atoms of one of the face diagonals are removed. Calculate the denstiy of unit cell if the radius of Mg^(2+) is 0.7 Å and the corner ions are touching each other. [Given atomic mass of Mg = 24, Ti = 48]

The spinel structure AB_(2)O_(4) consists of an fcc array of O^(2-) ions in which the:

Draw the Lewis structure of NH_(4)^(+) ion .

In the sphalerite (ZnS) structure S^(2-) ions form a face-centred cubic lattice. Then Zn^(2+) ions are present on the body diagonals at

With Zn^(2+) ions [Fe(CN)_(6)]^(4-) ions gives …ppt