Chemistry 9701 · AS & A Level · Chemical bonding

Chemical bonding — practice question

In which species is the underlined atom's outer shell not complete?

  • A$\text{BF}_3$
  • B$\text{CH}_3^-$
  • C$\text{F}_2\text{O}$
  • D$\text{H}_3\text{O}^+$

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