Logic Masters Deutschland e.V.

I am a 7th grade student. In science class, modelling an atom was our assignment and I chose Sudoku to do this.

Standard Sudoku rules apply: Place the digits 1-9 into each cell of the grid. Rows, columns or boldly outlined 3x3 boxes may have not repeated digits in them.

Clues outside the grid are the sum of the digits in the non-green cells between the 1 and the 9 in the respective row or column. (Because green cells represent neutrons and therefore they are uncharged.)
You can think of it like normal Sandwich Sudoku except the green cells are skipped.
Do the clues on the left remind you of anything about an atomic model?

All the blue and green cells are either between the 1 and the 9 in both their row and their column or they contain 1 or 9 themselves. (Because blue and green cells represent protons and neutrons and therefore they are in the nucleus.)

Yellow cells must contain 1 or 9. (Because yellow cells represent electrons and therefore they are in the outer shells.)

The dotted lines (outer shells) are just decorative, they can be ignored.
You can try this puzzle on F-Puzzles here.
You might prefer this link if you don't want the outer shells to be marked.