Test predictiv
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
Manuela Donici
Used 34+ times
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10 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Simbolul chimic pentru elementul potasiu este:
P
Po
Na
K
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Atomii elementului calciu contin urmatorul numar de particule elementare:
20 de electroni si 40 de protoni
20 de electroni si 40 de neutroni
40 de electroni si 20 de protoni
20 de electroni si 40 de nucleoni
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Cei 8 electroni ai atomului de O sunt repartizati in invelisul cu electroni astfel:
K2L8
K2L4M2
K2L6
K2L2M4
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Elementul care are 4 electoni pe stratul 3 sau M spunem ca ocupa urmatorul loc in SP:
G: a III-a A, P: a 4-a
G: a III-a B, P: a 4-a
G: a IV-a A, P: a 3-a
G: a IV-a B, P: a 3-a
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Elementul Li are configuratia electronica: K2L1. Pentru a ajunge la structura stabila Li prefera sa:
cedeze 1 electon
accepte 7 electroni
nici nu accepta, nici nu cedeaza avand structura stabila
accepte 3 electroni
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Denumirea substantei cu formula chimica NaNO3 este:
azutura de sodiu
azotit de natriu
azotat de nitrogen
azotat de sodiu
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Formula chimica pentru hidroxid de cupru (II) este:
CuOH
CuO
Cu2OH
Cu(OH)2
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