题目内容

Choose the right characterization of hydrogen()

A. 氢元素与氢原子表述为hydrogen,氢气的表述为bihydrogen。
B. 氢元素与氢原子表述为hydrogen,氢气的表述为dihydrogen。
C. 氢元素与氢原子表述为hydrogen,氢气的表述为hydrogens。
D. 氢元素、氢原子与氢气的表述都为hydrogen。

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Choose the right characterization ()

A. Group 2 elements are called "alkali metals".
B. Graphite is one of the hardest known materials.
C. Lithium is a Group 1 element containing just a single valence electron.
D. Helium gas is diatomic gas.

添加电解质不利于凝胶形成。( )

单链憎水基和较大极性基的分子或离子容易形成球状胶束。( )

选出下列不可用化学气相沉积来制备的化学反应()

A. Fe(C5H5)2=Fe+5C+5H2
B. Si(OC2H5)4+2H2O=SiO2+4C2H5OH
CH4=C(金刚石)+2H2
D. Ni(CO)4=Ni+4CO

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