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Toshkent viloyati quyi chirchiq tumani maktabining 7 – “ ” sinf o`quvchisi
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| bet | 2/8 | | Sana | 10.01.2024 | | Hajmi | 55,94 Kb. | | #134377 |
Bog'liq 7-Sinf KIMYO NAZORAT ISHI daftar 20222-Nazorat ishi:
Mavzu:
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) NH3 b) O2 c) Si D) CO2
4. 88Sr izotopi atomining yadrosini necha foizi neytronlardan iborat.
5. Xlorningvalentligibir, kislorodningvalentligiikkiekanliginibilganholdaformulalari FeCl2, AlCl3, LiCl, K2O, MgO, Cr2O3, CrO3, CrO, Mn2O7, MnO2bo‘lganbirikmalardagiikkinchielementlarningvalentliginianiqlang.
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