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Mathematics 12 Online
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.

OpenStudy (anonymous):

Hydrogen is an element made of only one kind of atom.

OpenStudy (anonymous):

thanks

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