Ch4 and nh3 are both sp3 hybridisation but the bond angle of nh3 is lower why
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All three molecules have four pairs of electrons around their central atom .
As a result , they all have a tetrahedral arrangment of electron pairs around the central atom .
The bond angle in methane , CH4 , is the tetrahedral angle , i . e . 109 . 5° ( 109° 28 ' ) .
Ammonia , NH3 , contains a lone pair of electrons , which repels the bonding electrons to give a bond angle of 1079 . The atoms have a trigonal pyramidal arrangement .
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