Who divided the elements into metals and non metals ??
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Hᴏʀᴀᴄᴇ G. Dᴇᴍɪɴɢ
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In 1923, Horace G. Deming, an American chemist, published short (Mendeleev style) and medium (18-column) form periodic tables. Each one had a regular stepped line separating metals from nonmetals.
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