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Thénard

[ tā-när ]
Louis Jacques 1777-1857
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French chemist who is best known for his 1818 discovery of hydrogen peroxide. Earlier, working with Joseph Gay-Lussac, Thénard also discovered boron (1808).

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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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