Átomos, moléculas e iões.
8th Grade
•20 Qs
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Átomos, moléculas e iões.
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Os protões são partículas com carga elétrica positiva.
Verdadeiro.
Falso.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
No núcleo dos átomos estão:
protões e eletrões.
protões e neutrões.
eletrões e neutrões.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Os eletrões têm carga negativa.
Falso.
Verdadeiro.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Os átomos são partículas neutras porque...
apresentam igual número de protões e de neutrões.
têm neutrões.
apresentam o mesmo numero de eletrões e de protões.
apresentam o mesmo número de eletrões e de neutrões.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
O que representa 4 C?
Quatro moléculas de carbono.
Quatro átomos de cálcio.
Quatro átomos de carbono.
Quatro moléculas de cálcio.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Quatro átomos de hidrogénio é igual a:
H4
4H
2H2
4 He
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
O que representa 5 CO2?
Cinco moléculas de dióxido de carbono.
Cinco átomos de carbono.
Cinco moléculas de água.
Cinco átomos de oxigénio.
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