Skynet 4F was initially located over 6°E for about a month and then manoeuvred to drift to the west. When it reached 2°E, a further manoeuvre started an eastbound drift, reaching 16°E.

image: By adjusting the occupancy of the 4f orbitals, it is possible to induce the HAT mechanism for the activation of C-H bonds. view more Credit: ©Science China Press ...

The willingness of the 4f orbitals of lanthanide metals to participate in chemical reactions is as rare as their presence in Earth's crust. A recent study, however, witnessed the 4f orbital in a ...