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7th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hydrogen là chất nào sau đây
H
He
C
O
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Helium là chất nào
He
Li
H
O
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lithium là chất nào sau đây
Li
He
B
Ca
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Beryllium là chất nào
Be
Br
He
Mg
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Boron là chất nào
B
Br
Al
Si
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Carbon
C
H
O
B
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nitrongen
N
O
F
B
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