题目内容

Which species have more than eight electrons around the central atom? ( )

A. BF3
BrF3
C. NF3
D. PF3

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Which chloride should exhibit the most covalent (least ionic) type of bond? ( )

AlCl3
BCl3
C. KCl
D. MgCl2

In the compound of xenon tetrafluoride, what’s the electron geometry? ( )

A. tetrahedral
B. square pyramidal
C. square planar
D. octahedral

In the compound of xenon tetrafluoride, what’s the molecular geometry? ( )

A. tetrahedral
B. square pyramidal
C. square planar
D. octahedral

Which statement describes a chemical property? ( )

Alkali metals can never be found free in nature
B. The rock is hard
C. Water boils at 100 oC
D. Phosphorus dissolves in carbon disulfide

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