In this Instructable, you will learn how to make an atom in TinkerCad.
Step 1: Electron Cloud
First, use a Torus thin shape 3 times to make the electron cloud. I made the dimensions 113mmx113mmx11.30mm. The middle two that are diagonal should be at 22.5 degrees on opposite sides. Then, make the horizontal tube at 90 degrees.
Step 2: Electrons
Then use three spheres, each with dimensions 20mmx20mmx20mm(1"x1"x1"), and put it on each tube such that the spheres do not intersect.
Step 3: Protons and Neutrons
Finally, use red and blue spheres, with dimensions 30mmx30mmx30mm to make the nucleus of the atom. I made the dimensions slightly bigger than before because electrons have a much smaller mass than a proton or a neutron. Since it's a lithium atom, I made 3 protons and 3 neutrons.