Legături chimice
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Compusul ionic cu punctul de topire cel mai mare, este:
KCl
NaCl
CsCl
RbCl
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Compusul ionic care conține ioni poliatomici este:
NH4Cl
Na2O
HClO4
KF
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Referitor la molecula de CO2 sunt adevărate afirmațiile:
conține 2 legături π
este polară
conține 3 atomi
conține 8 electoni implicați în legături
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Sunt molecule polare:
NH3
CH4
H2SO4
F2
5.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Referitor la combinația complexă [Co(NH3)4Br2](OH) sunt adevărate afirmațiile:
ionul metalic central este ionul de cobalt divalent(+2)
numărul de coordinare este 6
sarcina ionului complex este +1
este un compus ionic
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sunt adevărate afirmațiile, cu excepția:
în ionul hidroniu oxigenul este donor de electroni
molecula de apă este polară
polaritatea legăturii covalente crește cu creșterea diferenței de masă atomică dintre atomii legați direct
numărul de electroni implicați într-o legătură covalentă dublă este 4
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Numărulde ioni fluorură din 117 g de fluorură de calciu, este:
9,033x1023
6,022x1023
12,044x1022
18,066x1023
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