Partial hydrogen pressure (left column) and resulting hydrogen content (right column) in the cores of the modelled Type-2 planets. We have limited our models to M ≤ 3 M_⊕ which keeps below 1.2 GPa as the hydrogen solubility from Eq. (41) has been found to be considerably underestimated at higher pressures. The hydrogen content is computed from chemical equilibrium between the core and the mantle. It depends on the temperature at the CMB and the partial hydrogen pressure in the lowermost part of the mantle (see text for details).