An electron has:

An electron is fundamentally defined by its electrical charge, which is negative. This intrinsic property is key to its role in atomic structure and electricity. The negative charge of an electron is critical for the formation of chemical bonds, as it pairs with the positive charge of protons found in atomic nuclei. This interaction facilitates the stability of atoms and molecules, allowing for the vast array of chemical reactions that occur in nature.

Understanding the electron's negative charge also helps explain various physical phenomena. For instance, the flow of electrons in a conductor is what constitutes electric current. This is a fundamental concept in electricity and electronics, influencing everything from basic circuit theory to advanced semiconductor technology.

The other options incorrectly describe the charge of an electron, leading to misconceptions about its role and behavior in electrical contexts. The positive charge is a characteristic of protons, while the terms "no charge" and "neutral charge" typically refer to neutrons or atoms in their uncharged state, which do not convey the specific nature of electrons.