
Întrebări despre atom
Authored by gabriela ganea
Chemistry
7th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce particulă are sarcină pozitivă?
electronul
neutronul
protonul
nucleonul
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Numărul atomic al unui element ne arată:
numărul de neutroni
masa atomului
numărul de protoni
numărul de izotopi
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un atom este neutru din punct de vedere electric deoarece:
are același număr de protoni și electroni
are un nucleu neutru
neutronii neutralizează protonii
nu are sarcină
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Completează: Un atom de oxigen are numărul atomic 8. El are __ protoni și __ electroni.
8
8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce conține nucleul unui atom?
electroni
protoni și neutroni
doar protoni
protoni și electroni
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