How Many Valence Electrons Does Selenium Have?

Selenium is a chemical element with atomic number 34. The symbol of selenium is 34. The atomic mass of selenium is approximately 79 grams per mole. It is a non-metal and present in the 'p' block of the periodic table. The number of electrons in per shell of selenium atom is 2, 8, 18, 6. So, there are six electrons in the valence shell of the selenium. The electronic configuration of selenium atom is 4s² 3d¹⁰ 4p⁴. Moreover, it lies in the 16th group and 4th period of the periodic table.