Marvin 03051212252D 1 0 0 0 0 0 999 V2000 0.0000 0.0000 0.0000 H 0 0 0 0 0 15 0 0 0 0 0 0 M ISO 1 1 1 M END > CHEBI:29236 > protium atom > The stable isotope of hydrogen with relative atomic mass 1.007825 and a natural abundance of 99.9885 atom percent (from Greek πρωτοσ, first). > 3 > protium; protio; hydrogen-1; (1)H; (1)1H > protium > [1H] > 1.008 > 1.00783 > 0 > [1H] > InChI=1S/H/i1+0 > YZCKVEUIGOORGS-IGMARMGPSA-N $$$$