Question

The electron configuration for Helium (He) is shown below.
152
Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?
1P
ON

Answer 1

2 electrons in the atomic shell

Further explanation

Helium belongs to the noble gas group (group 18), s block and period 1

Electron configuration: 1s²

Symbol: ₂He⁴

With atomic number 2 and mass number 4, the composition of the subatomic particles is:

2 protons, 2 electrons, and 2 neutrons

2 protons and 2 neutrons make up the atomic nucleus while 2 electrons are in the atomic shell