What is the electron configuration for helium?
A neutral helium atom will thus have
Both of these electrons are located on the first energy level, in the only subshell, and consequently only orbital available to them.
More specifically, both electrons will occupy the
The electron configuration will thus be
#color(green)(|bar(ul(color(white)(a/a)color(black)("He: " 1s^2)color(white)(a/a)|)))#
Here's how the electron configuration of helium looks compared with that of hydrogen,