Six Senses and Four elements The six senses are arises from NamaRupa in PaticcaSamuppada. NamaRupa paccaya Salayathana. So basically all 6 senses are a combination of Mentality(Nama) and Form (Rupa - which is a combination of the four great elements).

How is the mind (6th sense) created from the Form? As in from the 4 elements? Is it created from unseen molecular level 4 elements? 

Is it somewhat similar to Light? Where light was considered as an energy but later it was considered as both energy and particles as well?
In case of the mind-sense(the stream of Bhavaangha cittas), the object received by the sense is a thought itself. There's no physical element involved. That's why Arupa beings only have the mind sense. 

'Energy' is a concept. There's no such thing according to Buddhism. Even sunlight is said to be containing the pure octad. Anything physical is Rupa and the rest is Nama.