
me ba tuan beo
Authored by Ayaka Kamisato
Biology
12th Grade
Used 9+ times

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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số electron lớp ngoài cùng của các ng tử kim loại thuộc nhóm IIA là
3
2
4
1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức chung của oxit kim loại thuộc nhóm IA là
R2O3
RO2
R2O
RO
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cấu hình electron của ng tử Na (Z=11) là
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại không phản ứng với nước ở nhiệt độ thường là
Be
Ca
Ba
Sr
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khi dẫn từ từ khí CO2 đến dư vào dd Ca(OH)2 thấy có hiện tượng
Bọt khí và kết tủa trắng
Bọt khí bay ra
Kết tủa trắng xuất hiện
Ban đầu có kết tủa trắng, sau đó kết tủa tan dần
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
dd làm quỳ tím chuyển sang màu xanh là
NaCl
Na2SO4
NaOH
NaNO3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nước cứng là nước có chứa nhiều ion
Cu2+,Fe3+
Al3+,Fe3+
Na+,K+
Ca2+,Mg2+
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