Radha Krishna can’t broken into two. Lord Krishna is eighth Avatar of Vishnu.Radha was love towards Krishna.
Radha Krishna is Supreme Goddess in Hinduism.
Shri Krishna is the soul of Radha and Radha is definitely the soul of Shri Krishna. The relationship of Radha and Krishna is the embodiment of love, passion and devotion. Radha's passion for Krishna symbolizes the soul's intense longing and willingness for the ultimate unification with God. She is the undivided form of Shri Krishna. She will remain a mystery unless one can know her inexpressible divine elements. She is worshiper as well as his deity to be worshiped. She being a beloved of Shri Krishna is known as "Radhika".