Claim: Metallization pressure is different for ten different elements, one of which is hydrogen (the symbol H and atomic number 1) with a p, Mbar of 3.9.
Evidence: Metallization pressure is the pressure required for a non-metallic chemical element to become a metal. Every material is predicted to turn into a metal if the pressure is high enough, and temperature low enough. 1 hydrogen 3.9 Hydrogen is the chemical element with the symbol H and atomic number 1. 2 helium 329 5 boron 1.6 6 carbon 11 7 nitrogen >> 5 8 oxygen 0.96 9 fluorine . 10 neon 2084 14 silicon 0.12 15 phosphorus 0.048 16 sulfur 0.83 17 chlorine 2.0 18 argon 5.1 32 germanium 0.11 33 arsenic 0.022 34 selenium 0.23 35 bromine 0.25 36 krypton 3.1 52 tellurium 0.04 53 iodine 0.16 54 xenon 1.3 86 radon