Question #2d908

Question

5538 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-09-19T03:21:11

You may want to draw the bonds between them. Just remember that the cation will be attracted to the anion.

Answer 2 · 2016-01-15T21:09:03

It is difficult to draw the lattice structures of ionic compounds without a computer.

It is more important that you be able to recognize the unit cells in the lattice structures.

The positive and negative ions are often in a cubic array. Here are two examples.

#"CsCl"#, a simple cubic structure

The #"Cl"^-# ions are the blue atoms at the corners of the cube.

www.tf.uni-kiel.de

The #"Cs"^+# ions are at the centre of the cube.

The unit cell extends through the whole crystal.

This animation shows the #"CsCl"# lattice, the #"Cs"# sublattice in blue, and the #"Cl"# sublattice in brown.

departments.kings.edu

#"NaCl"#, a face centred cube

The green #"Cl"^-# ions occupy each corner and the centre of each face of the cube.

www.che.kyutech.ac.jp

In the picture below, the #"Na"^+# ions also occupy a face-centred cubic unit cell.

www.webelements.com

These unit cells extend through the whole crystal.

nersp.osg.ufl.edu