
Nemetale
Authored by Delia Nemes
Chemistry
8th Grade
Used 76+ times

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20 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Oxigenul (Z=8, A=16) conține în nucleu
16 protoni
8 electroni
16 neutroni
8 protoni și 8 neutroni
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oxigenul diatomic și ozonul sunt pentru oxigen
molecule monoatomice
izotopi
forme alotropice
compuși
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Este cel mai răspândit element de pe planeta noastră
oxigenul
carbonul
azotul
siliciul
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Este proprietate fizică comună pentru oxigen, clor și hidrogen
culoarea
mirosul
densitatea
starea de agregare
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oxigenul este un gaz care
arde
nu întreține arderea
întreține arderea
nu arde
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În procesul de fotosinteză
se consumă oxigen
se formează oxigen
se consumă azot
se formează dioxid de carbon
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oxigenul se poate obține prin
electroliza sării
descompunerea apei oxigenate
arderea carbonului
descompunerea carbonatului de calciu
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