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OpenStudy (anonymous):
Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen? Hydrogen is an element made of only one kind of atom. Hydrogen is a compound made of only one kind of atom. Hydrogen is an element made of two or more kinds of atoms. Hydrogen is a compound made of two or more kinds of atoms.
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OpenStudy (anonymous):
Hydrogen is an element made of only one kind of atom.
OpenStudy (anonymous):
thanks
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