身近な科学
Why does ice float?
Water is bent rather than linear, so its bond dipoles do not cancel and the molecule is polar.
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短い答え
Water is bent rather than linear, so its bond dipoles do not cancel and the molecule is polar.
本当は何が起きている？
Table salt is not made of isolated NaCl molecules in the solid; it forms an extended ionic lattice.
役立つイメージ
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Water is unusual: its hydrogen-bonded solid structure is more open than liquid water, so ordinary ice is less dense and floats.