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Venus and Mercury definitely contain the greatest amount of hydrogen in our solar system. gb
itself
Hydrogen
14 hydrogen atoms.
Hydrogen & helium
Hydrogen Thank you
Hydrogen is present in the greatest number of atoms, if that is what is meant by "particles" in the question.
"Quick!" said Bob, "get on the giant flying pig salamander toad before the world ends in an abrupt explosion after the atomic mass of hydrogen reaches 3!"
hydrgen nucleus
This chemist studied hydrogen peroxide.
The species that contains the greatest percent by mass of hydrogen is H3O with a plus 1 charge on the Oxygen molecule. The species that is the Bronsted-Lowery acid in the forward reaction is NH4 with a plus 1 charge.
Hydrogen gas has the lowest mass out of ammonia, bromine, hydrogen and chlorine, so it would have the highest velocity for a given kinetic energy.