I believe it would be the last one since it is from the national institutes of heath, and that it the most reliable source.
Answer:
what do you mean by this question
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Conditions are being used to try and isolate solid hydrogen cooled to low sufficient temperatures, hydrogen can grow to be strong at high sufficient pressures, and while the detail solidifies, it turns into steel.
At exceedingly low pressures, Hydrogen is compressed stable hydrogen turned into obvious. as the compression intensified, it began to show opaque and black. but at 495 Gpa, the hydrogen becomes shiny and reflective, indicating its transformation into a metallic despite the fact that the researchers cannot make sure whether or not it becomes solid or liquid).
Hydrogen can also be stored on the surfaces of solids (via adsorption) or inside solids. In adsorption, hydrogen is attached to the surface of cloth both as hydrogen molecules or as hydrogen atoms.
Learn more about hydrogen here:-brainly.com/question/19813237
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Jellyfish, Sponges and Worms are all invertebrates.
