Why do all regular tetrahedral molecules have the same bond angle? and Talking about bonded labour

Why do all regular tetrahedral molecules have the same bond angle?

Why is 109.5 degrees the bond angle in CH4, SiH4, GeH4, SnH4, and any other regular tetrahedral molecule?


Bond best answer:

Answer by CuriousGeorge
i think it is when all the electron repulsions are minimized

Bond

Talking about bonded labour


Image by bbcworldservice
Despite being abolished in 1976, bonded labour still exists in India.

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