The nature of hybridization of ‘N’ in ${\mathrm{NF}}_3 \mathrm{is}$

The nature of hybridization of ‘N’ in ${\mathrm{NF}}_3 \mathrm{is} {\mathrm{sp}}^3$

Sum of attached atoms + lone pairs 3 +1=4$\Rightarrow {\mathrm{sp}}^3$ hybridization

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${\mathrm{Sp}}^3,101.9^{°},$pyramidal