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Authored by men nguyen
Science
7th Grade
Used 2+ times

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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là đơn chất?
H₂O
NaCl
O₂
CO₂
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là hợp chất?
N₂
H₂O
O₂
H₂
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tử O₂ gồm:
Một nguyên tử O
Hai nguyên tử O giống nhau
Hai nguyên tử khác nhau
Ba nguyên tử O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là đơn chất phi kim?
H₂
Na
Fe
NaCl
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là đơn chất kim loại?
O₂
H₂
Fe
CO₂
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là hợp chất?
H₂
Cl₂
CO
O₂
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tử CO₂ gồm:
Một nguyên tử C, hai nguyên tử O
Hai nguyên tử C, một nguyên tử O
Một nguyên tử C, một nguyên tử O
Hai nguyên tử C, hai nguyên tử O
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