
COP 3B 7 класс
Quiz
•
Chemistry
•
6th - 8th Grade
•
Practice Problem
•
Easy
Саулеш Даденбекова
Used 2+ times
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6 questions
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1.
MULTIPLE SELECT QUESTION
1 min • 1 pt
1. а) Дан фрагмент Периодической системы,
Определите, какие элементы обозначены символами X, Y, Z? Какие это элементы?
Na
Mg
Si
P
Cl
2.
OPEN ENDED QUESTION
5 mins • 1 pt
1.б) Используя таблицу Менделеева, назовите:
Evaluate responses using AI:
OFF
3.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
2. Углерод имеет три изотопа
Определите состав их
атомного ядра
6p,6n,6e
6p,7n,6e
7p,6n,7e
6p,8n,6e
4.
OPEN ENDED QUESTION
5 mins • 1 pt
3. а) Составьте химические формулы следующих веществ с учетом их валентности
и подчеркните оксиды в задании
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OFF
5.
DRAW QUESTION
5 mins • 1 pt
в) Определите валентность по формулам веществ
Al2O3 Na2O CaO P2O5 SnO2

6.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
4. Составьте химические формулы и посчитайте относительную молекулярную массу веществ:
а) ортофосфорной кислоты; б) пропана
H3PO4, Mr=98
H3PO3, Mr=96
C3H8 Mr=42
C3H8 Mr=44
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