Algodoo

Contains:
First 36 elements, minus transition metals

How to use:
Connect the white circles on the atoms with the endpoints of the strings to make a bond.

12th July, 2026 - First and Final Update
Added ions, molecule examples, d.orbitals and overhauled designs

13th July, 2026 - I May Have Lied About the First One
Changed the designs for Mg, As and Se, Added Ne ions and the rest of the d-orbital atoms

Update plans:
Ions (done)
Alt designs (done)
Examples (done)