It's called a crystal if it's a regular, repeated pattern. It's called an amorphous solid if it has no regular pattern (which is unusual for ionic solids).
crystal
There is a sea of delocalised electrons formed in a metallic element, and the ions are attrracted to this.
I would say physical because the internal atom arrangement is not changing, only the appearance
A gas called water vapour is formed, it is steam.
The ion formed by chlorine is the "chloride" ion
It depends on if the elements involved are metals or nonmetals.
What is the Lattice Structure
An orderly pattern of ions or atoms in a solid is a crystal.
molecules
molecules
crystal lattice
a crystal.
It is called syntax.
Electromagnetic spectrum is formed due to the difference of wavelengths and frequency of electromagnetic radiations as they are orderly distributed.
If you mean syntax, it is the arrangement of words to create well formed sentences
Planes of minerals formed in response to stress, a feature of many metamorphic rocks
an arrangement of stars in the shape of a cross formed by the five brightest stars in Cygnus (the swan)
There is a sea of delocalised electrons formed in a metallic element, and the ions are attrracted to this.