davriĭ jadval
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kimyo tv d.i.mendeleevning elementlar davriy sistemasi davr- lar guruhlar a i b a ii b a iii b a iv b a v b a vi b a vii b a viii b 1 (h) 1 h 1,0079 vodorod 2,1 2 he 4,00260 geliy 1 2 3 li 6,94 litiy 1,0 4 be 9,01218 berilliy 1,5 5 b 10,81 bor 2,0 6 c 12,011 uglerod 2,5 7 n 14,0067 azot 3,0 8 o 15,9994 kislorod 3,5 9 f 18,99840 ftor 4,1 10 ne 20,17 neon 2 3 11 na 22,98977 natriy 0,9 12 mg 24,305 magniy 1,2 13 al 26,98154 alyuminiy 1,5 14 si 28,086 kremniy 1,8 15 p 30,97376 fosfor 2,1 16 s 32,06 oltingugurt 2,5 17 cl 35,453 …
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