cau1
theo li thuyet thi nkhong co dap an vi 3p?&2p?con thuc te thi la lien ket ion vi giua kim loai va phi kim con dua vao do am dien thi chua chac
cau2
Cl2 phan tu cua cung mot nguyen to thi ko phan cuc
CO2 trong nguen tu thi co phan cuc nhung xet phan tu thi khong phan cuc do mach thang
C2H2 cung nhu 2 cai tren cong lai
cach nhan biet thi chi co phan tu cua mot nguyen tu con mach thang thi kho hon nhu H2O cung 2H kheo O nhung lai phan cuc do co goc khong bang180 do
co the loai tru theo tung dap an
cau 3 theo li thuyet lien ket ion co hieu do am dien giua 2 nguyen tu >=1,7
=>B
trong khi tinh khong dc nhan he so
cau4:ASiH4dung chung e khong dat cau hinh ben cua khi hiem
C thi dung nhung B cung dung Becho2e-->cau hinh He
cau5
X thuoc 4chu ki dau co e<66/3=>O hoac S(co the nhin dap an suy ra vi trac nghiem)
eM=(66-eX*3)/2
eX=8=>Sc
eX=16=>F(loai do dau la lien ket ion)
=>C
cau6
do tan cuaCH2O
| trong nước | > 100 g/100 ml (20 °C) |
chacC
cau7
tinh ra N2O5 co 2 lk cho nhan
cong hoa tri la so lien ket lien ket cho nhanchuong trinh THCS cho do la 2lk THPT cho do la 1lk =>THPT4;THCS5