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Water expands on solidification due to a property called Anomalous Expansion of water.
Also the hydrogen bond in water on cooling expands and the oxygen bond decreases and contracts.
Note the image where the white molecules are hydrogen have expanded out of the container(the white line) and the red molecules are oxygen which have been lessened.
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d decrease balance it
so doesn't the icrease and decrese balance it
yes it balances but due to the strength of H2 molecules it expands in shape and size
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