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It is stronger because the electron configuration of Carbon is 2.4 and of Silicon is 2.8.4. Because more rings are filled by the electrons in silicon the outer shell is further away from the nucleus. Therefore, the attraction between the electrons and protons (electrostatic attraction) in the nucleus is less than in CH4. Hope this helps.

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15y ago
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12y ago

There is a larger difference in electronegativity between Silicon and Chlorine and therefore is a stonger bond.

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11y ago

checking bonding energy

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Q: Why is C-H bond in CH4 stronger than Si-H bond in SiH4?
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