Валентность
1st - 5th Grade
•14 Qs
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Валентность
Quiz
•
Chemistry
•
1st - 5th Grade
•
Practice Problem
•
Medium
Татьяна К
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14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Относительная молекулярная масса NaOH равна
25
30
40
45
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Валентность Са?
1
2
3
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Определите валентность брома в его оксиде BrO3.
2
3
6
1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Выберите ряд химических элементов , проявляющих только постоянную валентность
натрий, медь, кислород, фтор
железо, цинк, хлор
алюминий, магний, литий
алюминий, кальций, сера
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Найдите ряд, в котором все химические элементы образуют оксид с общей формулой Э2O
H; Fe; Cl
Li; Na; K
Al; B; H
C;P;Fe
6.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Относительная атомная масса кремния равна...
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Относительная молекулярная масса оксида фосфора (V) равна....
144
142
140
135
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