1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2
CuO+H2SO4=CuSO4+H2O
CuSO4=Cu+................???
2Cu+O2=2CuO
CuO+2NaNO3=Cu(NO3)2+Na2O
3CH≡CH =(C(актив.), t)= C6H6(бензол)
CH≡CH + H2 = CH2=CH2(этен)
C6H6 + CH2=CH2 =(AlCl3, t)= C6H5(CH2-CH3)
MgOHNO₃
MgOHNO₃ + HNO₃ = Mg(NO₃)₂ + H₂O