Can you give a new and cool conct in physics or chemistry?

Sure! Calculate the energy savings per year from lowering your water heater temperature from 160F (where your dad set it) to 110F (where it should be set). Here's another: Design a new spacecraft...

Atomic theory, electrochemistry (batteries and such) and analytical chemistry were developed by both sciences. If you think of it, physics and chemistry are inseparable from each other

I took biology this year, and I'll take chemistry next year.

Physical Science dbc15f23-9116-4db6-8e12-f0485e1a0a591.03.01

Sure. But be aware that most new visions are really very old visions that didn't work. Don't fall in love with an idea.