Thâu-ia̍h
Appearance
chhiat-oāⁿ Thâu-ia̍h (Pe̍h-oē-jī) — 頭頁 (漢字) 切換
維基共享資源 |
今仔日的圖相
Interrupted Reading by French artist Jean-Baptiste-Camille Corot. Today is World Book Day.
今仔日的影片
![]() Preparation of amorphous silicon (1) and magnesium silicide (2), upon reduction of powdered sand with magnesium powder:
(1) SiO2(s) + 2Mg(s) = Si(s) + 2MgO(s); and (2) 2Mg(s) + Si(s) = Mg2Si(s).The reaction described by (1) is initiated by heating; then it is self-sustained and is highly exoenergetic. 加入
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內容
照主題自然 社會 · 文化 科學 工程 照地點宇宙 照分類圖相 照創作者照授權版權授權方式 照來源仝這日的圖相 |