1.Previous
3.Next

electron configuration is 1s², therefore n = 1, and the orbital contains two electrons). An atom's nth electron shell can accommodate 2n² electrons. For example, the first shell can accommodate two electrons, the second shell eight electrons, the third shell eighteen, and so on. The factor of two arises due to electron spin. Each atomic orbital admits up to two otherwise identical electrons with opposite spin, one with a spin + (usually denoted by an up-arrow) and one with a spin

1.Previous
3.Next