Writing scientific papers

Read review articles in scientific journals to know what problems are not solved yet.

How to write a scientific paper. IMRAD

List of scientific journals

Astrophysics journals:
Astronomy and astrophysics
Astrophysical journal

Physics:
Advances in physics (reviews)5000$/year
American journal of physics (entertaining)
Journal of physics,A, B, and G(reference)
Nature physics(everything)
Physical review/ physical review letters(broad reviews of physics topics)

get these magazines for free at the library or read free ones online.

Free ones online:

nature.com
Scientific American(not peer reviewed)