What element can act like a metal but never actually become a solid

Hydrogen 

Explanation:

reacts with most elements almost as if it were a metal. It acts like a metal but isn't a solid like a metal because of its low mass.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

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