where can hydrogen a natural be found?

What is true about metals used for jewelry such as platinum and gold? Where can you buy sulfur hexafluoride? Why is it easier to charge polythene by rubbing but not copper? Why is fluorine typically used? What is a mixure? What kind of crystalline solid is graphite? What element rhymes with chin? How do you remove a purple dye stain that resulted from washing a purple tye dyed shirt that bled on other clothing in the wash? Why does detergent work for clothes and not soap? How do you calculate the percentage of a substance in a mixture? What acid is in borax? What volume of a 0.357 M hydrochloric acid solution is required to neutralize 24.3 mL of a 0.200 M potassium hydroxide solution? What is most important to scientific process? What mineral makes the color blue? Which element combines with silicon to form the tetrahedron? How fast does sterling silver tarnish? Suppose element x is a poor conductor of electricity and breaks when hit with a hammer and element z is a good conductor of electricity in what part of the periodical table does each belong? What will happen if aluminum is mixed with copper? What is the ratio of elements in CL2? How hydrophore tank works in water system?

where can hydrogen a natural be found?