
Nemetalele
Authored by Olga Surujiu
Chemistry
10th Grade
Used 13+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Atomul de fosfor are pe stratul exterior electroni de valență
2
4
3
5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În compușii cu oxigenul fosforul manifestă grad de oxidare maximal egal cu
+3
-2
+5
+7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Compusul hidrogenat al fosforului are formula
P2O5
PH3
H3PO4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În compușii cu hidrogenul azotul are valența:
I
III
V
II
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care element formează compus volatil cu hidrogenul soluția căruia are pH mai mare ca 7
C
N
F
H
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Substanța este formată doar din elemente s
C
N
F
H
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În compoziția nucleului conține 6 protoni și 6 neutroni
C
N
F
H
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