Nov 10, 2025 · Learn about electron shells and orbitals for your A-level chemistry exam. Find information on quantum numbers, subshells and orbital shapes.

Each shell consists of one or more subshells, and each subshell consists of one or more atomic orbitals. In 1913, Niels Bohr proposed a model of the atom, giving the arrangement of …

You can write the full electron configuration in terms of subshells. Going back to the above example, Lithium is 1s 2 2s 1 (1s has 2 electrons, 2s has 1 electron).

The electrons in an atom are arranged in shells that surround the nucleus, with each successive shell being farther from the nucleus. Electron shells consist of one or more subshells, and …

Read this tutorial to learn about electron shells, electron orbitals, and subshells, as well as electron configurations!

Shells do not have specific, fixed distances from the nucleus, but an electron in a higher-energy shell will spend more time farther from the nucleus than does an electron in a lower-energy …

Inside each shell there are subshells corresponding to different rates of rotation and orientation of orbitals and the spin directions of the electrons. In general, the farther away from the nucleus …

Electrons are typically organized around an atom by starting at the lowest possible quantum numbers first, which are the shells-subshells with lower energies. Consider H, an atom with a …

Space, where electrons move around the nucleus inside an atom, is divided into subspaces known as shells, subshells and orbitals. The primary energy levels are called shells. The …

May 9, 2024 · When an electron shell is divided into one or more subshells, they are simply sets of one or more orbitals. Each letter of the sub-shells indicates a different shape.