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yang hebat kimia, silahkan masuk ke koridor?15*?
tolong di bantu ya, jawabnya kalau bisa menggunakan cara.
1. Jika masa rata-rata 1 atom unsur x=3,35x10^-23gr dan massa 1 atom c-12=1,99x10^23.
hitunglah massa atom relatif (AR) XI
2. Tuliskan konfigurasi elektron dari
10 79 28
O, Se, Si , Mg^2+
8 34 14 12
1 Answer
- MuktiLv 710 years agoFavorite Answer
1).
massa rata2 1 atom x
Ar X = ----------------- ---------- ---------
1/12 massa atom C-12
3,35 x 10^-23
Ar X = -------------- -----------
1/12 x 1,99 x 10^-23
Ar X = 20,20
2);
O : 2 8
Se : 2 8 18 6
Si : 2 8 4
Mg^2+ : 2 8
.
.
..
