The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is

What is a positive and a negative ion?

A space lattice of a crystal has alternate positive and negative ion in the lattice. Comment.

When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution : The positive ions will start moving towards the anode the negtive ions will stop moving, The positive and negative ions will move towards the anode, The positive and negative ions will start moving randomly, The negative ions will continue to move towards the anode and the positive ionns will stop moving

Defects which do not disturb the stoichiometry are called stochiometric defect. At the time of crystal formation an ion may not occupy its expected position leaving a void or hole at that site. As a metter of fact one positive and one negative ion are missing from their respective positions leaving behind a pair of holes. This vacancy is a Schottky defect. Due to this defect density decreases. Defect arises in which certain atoms or ions have migrated to interstitial position some distance removed from the holes which they vacated. In this case there is no change in the density of the crystal. In stoichiometric defects, the ratio of positive and negative ions as indicated by chemical formula of the compound

In antifluorine structure, the negative ions :