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Chemistry, 21.12.2020 14:00 lambobacon9467

العدد الذري Ar=18
N=7
Mg=12
H=1
CI=17
Na=11
C=6
Al=13
0=8
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العدد الذري Ar=18
N=7
Mg=12
H=1
CI=17
Na=11
C=6
Al=13
0=8

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