Chemistry 5070 · O Level · Ion and ionic bonds

Ion and ionic bonds — practice question

When metals react with a non-metal to make an ionic compound, they lose electrons. Calcium reacts with hydrogen to produce the ionic compound calcium hydride, $\mathrm{CaH_2}$. How many electrons are in the outer shell of each of the two hydride ions in $\mathrm{CaH_2}$?

  • A0
  • B1
  • C2
  • D4

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