The electron configuration of barium (atomic number 56) can be written three different ways:
- Full configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
- Compressed (without all standard script numbers): 1s2 2s2p6 3s2p6d10 4s2p6d10 5s2p6 6s2
- Noble Gas form : [Xe] 6s2 (this works because [Xe] symbolizes the electronic configuration of Xenon, which is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6. When added to 6s2, it is equivalent to the full electron configuration of Barium, when neutral.)
The electronic configuration for barium is [Xe] 6s^2 2, 8, 18, 18, 8, 2.
You first look at Barium's location on the Periodic Table: 6th period down, second group across. This puts it in the s block of the periodic table, which includes the first two vertical groups. Then you move back across the periodic table, looking at each lower element's atomic number until you reach a noble gas. Barium is element 56, so looking at element 55 we come across cesium. Going one lower and looking at element 54, we reach xenon, Xe, which is a noble gas. This is the basis behind the name "noble gas notation." Since xenon is the heaviest noble gas that is lighter than barium, we begin the notation with the symbol for xenon in brackets: [Xe]. Since barium is the second element over in the s block and the 6th period down, we can expand this to [Xe]6s2, which is the complete noble gas notation.
The electronic configuration of barium is [Xe] 6s2
It can achieve a noble gas configuration only by losing two electrons (as in Ba2+ ion)
[He] 2s2 2p1
[Xe] 6s2
[He]2s2
[Xe]6s2
[Xe]6s2
There is no noble gas configuration for hydrogen.
Krypton is a noble gas and already has noble gas configuration.
The noble gas configuration for manganese is [Ar]4s23d5
The noble gas electron configuration of radon is [Xe]4f145d106s26p6.
Krypton is already a noble gas and hence need not gain noble gas configuration.
[He] 2S2 is the noble gas electron configuration for beryllium.
There are two possible 'noble gas' configurations:2 8 18 32 18 8 for Bi3-, or in shorthand configuration [Xe] 4f14, 5d10, 6s2 6p6and2 8 18 32 18 0 for Bi5+, or in shorthand configuration [Xe] 4f14, 5d10, 6s0 6p0Bismuth (as metaloid atom) in elemental notation: [Xe] 4f14, 5d10, 6s2 6p3
Electronic configuration of beryllium: 1s2.2s2
There is no noble gas configuration for hydrogen.
Krypton is a noble gas and already has noble gas configuration.
The noble gas configuration of strontium is [Kr]5s2.
The noble gas configuration for manganese is [Ar]4s23d5
The noble gas electron configuration of radon is [Xe]4f145d106s26p6.
Krypton is already a noble gas and hence need not gain noble gas configuration.
The "Noble gas electron configuration," or the condensed electron configuration, for F is [He] 2s2 3p5.
The element chlorine does not have noble gas configuration. But chloride ion formed (when chlorine accepts an electron) has noble gas configuration of argon.
Only group 18 elements have noble gas configuration. All other elements lack a noble gas electronic configuration.