2-Nazorat ishi:
Mavzu:
Atom. Atom tuzilishi haqidagi bilimlarning rivojlanish tarixi
Atom va uning tuzilishi, proton, neytron va elektronlar
Kimyoviy element. Kimyoviy belgi
Kimyoviy elementning nisbiy atom massasi
Izotoplar. Izobarlar. Izotonlar
Kimyoviy formula. Valentlik
Nazorat shakli:
Yozma ish.
1.Quyidagi formulalarni valentlik asosida tuzing :
II CuO III CrO VII ClO AlO I HgO KO III NH
IVCO II H S VI SO
2. Xlorning valentligi besh ekanligini bilgan holda uning kislorod bilan hosil qilgan birikmasining formulasini yozing.
3. Quyidagi moddalarning proton,neytron va elektronlarini aniqlang:
a) NH
3
b) O
2
c) Si D) CO
2
4.
88
Sr izotopi atomining yadrosini necha foizi neytronlardan iborat.
5.
Xlorningvalentligibir, kislorodningvalentligiikkiekanliginibilganholdaformulalari FeCl
2
, AlCl
3
, LiCl, K
2
O, MgO, Cr
2
O
3
,
CrO
3
, CrO, Mn
2
O
7
, MnO
2
bo‘lganbirikmalardagiikkinchielementlarningvalentliginianiqlang.
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