Metal hydrogen is going to be "played bad"
Hydrogen is the most abundant element in the universe, and it is also the first element in the periodic table, belonging to the first main group. In high school chemistry, we know that the first main group is alkali metals, such as lithium, sodium, potassium, rubidium, cesium and francium, which are very active metals, but hydrogen, which is the first in the first main group, is a bit out of place because it shows non-metallic properties.
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