Havoning tarkibi qanday, 78% azot 21% kislorod 1% boshqa gazlar, 20% kislorod,15% azot, 10% inert gaz 70% azot 20% kislorod, moddalarning qanday agregat holati bor, qattiq modda ,yumshoq,suyuq, qattiq ,suyuq,gaz, qattiq yumshoq, gaz, ishqoriy metallarning qatorini toping, Li Na K. Rb Cs Fr, Mg O Ca P Be, Be Mg Ca Fe Cu

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