Why the energy of electron is negative?

More Questions

• Why energy of electron is negative?
• Why are electrons negatively charged?
• Why electron have negative charge?
• Why gravitational potential energy is negative?
• Why is gravitational potential energy always negative?
• What is the negative of a negative rational number?
• Why a negative times a negative is a positive?
• What is the difference between kinetic energy and potential energy?
• What is difference between kinetic energy and potential energy?
• How to convert mechanical energy into electrical energy?