A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe.
Answer: what do i have to do to help.. ;-; like i need instructions and why are the words coverd off black??
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Explanation:
I think the first blank is "solidity" and second is "object."
