When nitrogen makes 3 covalent bonds it has no charge, but when it makes 4 covalent bonds, it is positively charged. Thus the correct option is C.
<h3>What is covalent bonds?</h3>
A covalent bond is formed when two atoms exchange one or more electron pairs. Atoms form covalent bonds with one another in order to produce a complete electron shell, which increases stability.
When nitrogen forms three covalent bonds, it is neutrally charged, but when it forms four, it becomes positively charged. Nitrogen establishes four connections by giving one of its electron pairs to the empty orbital of another atom which is creating a coordinate bond.
Therefore, option C is appropriate.
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"Your question is incomplete, probably the complete question/missing part is:"
When nitrogen makes ______ covalent bonds it has no charge, but when it makes ______ covalent bonds, it is positively charged.
A. 1,2
B. 2,3
C. 3,4
D. 4,3
