
Повторение тем 8 клаасса
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
Александр Чорбу
Used 3+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Сколько электронов содержится в атоме кальция?
40
25
20
2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Число валентных электронов атома углерода равно
2
4
12
6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Заряд атома натрия равен
+1
+12
12
0
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Валентность фосфора в соединении P2O5 равна
V
III
II
5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Высший оксид хлора имеет формулу
Cl2O7
Cl2O5
ClO3
Cl2O
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Степень окисления кислорода в соединении H2SO4 равна
0
-2
+2
-1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Степень окисления железа в соединении FeCl3 равна
+3
+2
+1
-1
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