
Legătura covalentă
Authored by NICULAE ANCA
Chemistry
9th Grade
Used 68+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Legătura covalentă se formează:
Prin punere în comul de electroni între un metal și un nemetal
Prin punere în comul de electroni între nemetale identice sau diferite
Prin cedare și acceptare de electroni
Prin atracția electrostatică a două nemetale
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se găsesc legături covalente simple în molecula:
CO2
O2
H2O
N2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Numărul total de electroni puși în comul în molecula de apă este:
2
4
6
8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Conține legături covalente duble molecula:
CO2
CH4
HCN
C2H2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nu poate forma legături covalente duble:
C
N
S
H
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Molecula în care niciun atom nu are electroni neparticipanți este:
H2O
O2
CO2
CH4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Numărul de perechi de electroni neparticipanți ai azotului în molecula de amoniac (NH3) este:
1
2
3
0
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