Tuman maktab 8 sinf o‘quvchisi

Sana_________

3-nazorat ishi masalar yechish

1-Variant

1. Kimyoviy elementlarning yadro zaryadi ortib borgan sari davrlarda va asosiy guruhlarda metallik, melallmaslik. atom radiusi. elektrmanfiylik kabi xossalar qanday o’zgaradi?

2. 300 ml 0,2M eritma tayyorlash uchun necha gramm NaNO₃ kerak?

3. Bcrilgan moddalarni kristall panjaralarini turini toping :

a) LiCl. b) Na₂SO₄ b)NH d) H₂ e) Ca₃(PO₄)₂ j) H₂S

4. 
   Q uyidagi yadro reaksiyalarni tugating va X elementini aniqlang:
   

₆ C+_1H→X

₈₈Ra→₈₆Rn

2-Variant

1. Berilgan moddalarni alomlari orasida bog'lanish turini aniqlang va izohlang:

CaF₂, F₂, LiCl. NH₃, N₂,

2. H₂SO₄ ni 0.2n eritmasidan 100ml tayyorlash uchun kerak kislotani massasini toping.

3. Quyidagi kislotalardagi kislota hosil qiluvchi elementni valentligini aniqlang.

H₂S. H₂SO₃, H₂SO₄, H₂CrO₄ HMnO₄,

4. Temirning izotopi ⁵⁶ neytronlar bilan nurlantirilganda, protonlar ajralib chiqadi. Bunda qanday atom izotopi hosil bo’ladi? Reaksiya tenglamasini toping.

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Ball_____________________ O’qituvchining imzosi