Valence Electron Md. Saifur Rahman The electrons at the outermost principal energy level of an element are called the valence electron of that element.You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?