Substances
The exosphere is made up of 56% Oxygen, 36% Sodium, 8% Helium, 1% Potassium and Hydrogen. Mercury has a big iron core that makes up 75% of the planets diameter. The mantle of Mercury is made up of silica. The compounds of Mercury are: Mercury dihydride (HgH2), Mercury diflouride (HgF2), Dimercury diflouride (Hg2F2), Mercury dichloride (HgCl2), Dimercury dichloride (Hg2Cl2), Dimercury dibromide (Hg2Br2), Mercury diiodide (HgI2), Dimercury diiodide (Hg2I2), Mercury oxide (HgO), Dimercury dioxide (Hg2O), Mercury sulphide (HgS), Mercury selenide (HgSe), Mercury telluride (HgTe), Dimercury dinitrate dihydrate (Hg2(No3)2.2H2O). The alloy of Mercury is called Amalgam.
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