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17 June, 09:43

Describe the difference in structure between beH2 and CaH2

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  1. 17 June, 10:06
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    Hello!

    BeH₂ is a linear molecule, while CaH₂ is an angular molecule.

    The difference between these two molecules is given by the number of electrons they have. Beis in the 2nd period of the Periodic table, and the ion Be⁺² doesn't have any free electron pairs when bonding to H. Ca is in the 4 period of the periodic table, meaning that it has more electrons, and the ion Ca⁺² has two free electron pairs when bonding to H that makes the molecule angular by pushing the bonds at an angle by sterical hindrance.

    Have a nice day!
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