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জলের চেয়ে হালকা ধাতু সোডিয়াম ও জলের চেয়ে ভারী ধাতু লোহা।
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জলের চেয়ে হালকা ধাতু সোডিয়াম ও জলের চেয়ে ভারী ধাতু লোহা।