C- 13 protonów.................Al (glin)
D- 16 elektronó................S (siarka)
A- 5 okres, 2 elektrony wal...Sr (stront)
B- liczba Z-17..................Cl (chlor)
mAl2S3=2*27u+3*32u = 150u
mSrCl2=78u+2*35,5u = 149u
a- stront
b - chlor
c - glind - siarka
masa: Al2S3 = 27+27+32+32+32 = 150u (unit)masa: SrCl2 = 35,5+35,5+78 = 149u (unit)
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C- 13 protonów.................Al (glin)
D- 16 elektronó................S (siarka)
A- 5 okres, 2 elektrony wal...Sr (stront)
B- liczba Z-17..................Cl (chlor)
mAl2S3=2*27u+3*32u = 150u
mSrCl2=78u+2*35,5u = 149u
a- stront
b - chlor
c - glin
d - siarka
masa: Al2S3 = 27+27+32+32+32 = 150u (unit)
masa: SrCl2 = 35,5+35,5+78 = 149u (unit)