Which process is Chemistry related? The water melon, the water skin near green and between to the red parts.

 Salt related...

Salt is NaCl, the first time I use chalk, or you can just write that yourself, that is probably the first thing you learn about tears,.....

Its salt water.

NaCl

Na is 1A, metal periodic table

Cl is at far side of your right side column periodic table. That is a leaving group session in your organic chemistry tale.