Why does sp hybridised orbital have more directional character than p orbital?

It states so in my textbook. But since s orbital is non directional, shouldn't sp hybridized orbital be less directional in character than p orbital?




[![enter image description here](https://i.stack.imgur.com/fd3AD.jpg)](https://i.stack.imgur.com/fd3AD.jpg)


Ignore everything else in image , this image is just for shape comparison.


As you can see in image that so orbital is a lobe with unsymmetrical shape this leads to its more directionality.


P orbital possess equal Electron Density on both sides of the orbital , but in case of sp orbital electron density isn't equal and that's the reason why sp is more directional than p .


That's also the reason for their different Electronegativity. 


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