State the trend of the structure of the hydride of group 4 element

Chemistry

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Answer

The hydrides of Group 4 elements are CH4\text{CH}_4, SiH4\text{SiH}_4, GeH4\text{GeH}_4, SnH4\text{SnH}_4, and PbH4\text{PbH}_4.

Step-by-step solution

3 steps

  1. Identify the bonding and electron arrangement.

    All Group 4 elements form four covalent bonds with hydrogen atoms. Each central atom has four bonding pairs of electrons and no lone pairs.

  2. Determine the molecular geometry using VSEPR theory.

    According to VSEPR (Valence Shell Electron Pair Repulsion) theory, four electron domains around a central atom will arrange themselves to minimize repulsion, resulting in a tetrahedral electron geometry. Since there are no lone pairs, the molecular geometry is also tetrahedral.

  3. State the trend in structure.

    The trend is that all hydrides of Group 4 elements adopt a tetrahedral structure. The bond angles are approximately 109.5∘109.5^\circ.

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