Here's why:
* Sharing Electrons: Nitrogen and hydrogen both need to gain electrons to achieve a stable electron configuration. Nitrogen needs three electrons, and each hydrogen needs one. They achieve this by sharing electrons, forming a covalent bond.
* Polar Covalent Bond: While the bond is covalent, it's also polar. This is because nitrogen is more electronegative than hydrogen. This means nitrogen attracts the shared electrons more strongly, creating a partial negative charge on the nitrogen atom and a partial positive charge on the hydrogen atoms.
Let me know if you'd like more detail about covalent bonds or electronegativity!