The electron configuration of beryllium is written as [He] 2s2. This means that it has 2s2 electrons above the configuration of Helium.
Electronic configuration of beryllium: 1s2.2s2.
The electron configuration of beryllium is 1s22s2.
Beryllium has four orbitals in its electron configuration.
The electron configuration of beryllium is: 1s22s2. The atomic weight (not mass) of beryllium is 9,012 183(3).
The abbreviated electron configuration of sodium is [Ne]3s1.
The element with a valence electron configuration of 2s2 is beryllium. Beryllium has 4 electrons, with 2 in the 2s subshell, which makes it have a valence electron configuration of 2s2.
Electronic configuration of beryllium: 1s2.2s2
The abbreviated electron configuration of lithium is [He] 2s1.
Be
There are four electrons in a Beryllium atom. Hence the mono positive ion has only three electrons. Therefore the electron configuration is 1s2 2s1.
The electron configuration for beryllium, Be, is 1s22s2.