Navoiy shahar 16-sonli ayrim fanlar chuqur o’rganiladigan ixtisoslashgan maktabi 9-“ ”­­­­­ sinf o’quvchisi

Sana___________________________
3-Nazorat ishi
Mavzu:kremniy
Nazorat shakli:masala yechish va mashqlar yechish.
I-variant
1.Kremniyning fizik xossalarini yozing.
2.3,2gr silan olish uchun necha gr magniy silidsid xlorid kislota bilan reaksiyaga kirishadi?
3.Si ning oxirgi elektronini to’rtta kvant sonlarini yozing.
Kompetentlikni aniqlash uchun materiallar:
4.Qumdagi kremniy va kislorodning massa nisbatini yozing.
5.Yurtimizdagi qaysi shaharlarining binolarida sopoldan tayyorlangan naqshlarni uchratamiz?
II-variant.
1.Kremniyning olinish reaksiya tenglamasini yozing.
2.Kremniyning elektronlarining necha %ini sharsimon elektronlar tashkil etadi?
3.6,4gr silan yonganda necha gr kremniy (IV)-oksid hosil bo’ladi?
Kompetentlikni aniqlash uchun materiallar:
4.Shishani qnday turlarini bilasiz?
5.Silandagi kremniy va vodorod atomlar soni nisbatini toping.

Yechish:
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