Short-hand version: [Kr] 5s^2 Note: The "^" symbol means the the following number is in the form of a superscript.
Sr, Strontium (atomic number 38)
The abbreviated electron configuration of sodium is [Ne]3s1.
The abbreviated electron configuration of lithium is [He] 2s1.
The electron configuration of boron is [He]2s2.2p1.
The abbreviated electron configuration for argon is [Ne] 3s^2 3p^6. The [Ne] represents the electron configuration of the noble gas neon, which has the same electron configuration as the inner electrons of argon.
The electron configuration of strontium is 1s22s22p63s23p63d104s24p65s2.
The abbreviated electron configuration of oxygen is [He] 2s^2 2p^4.
[Kr] 5s2
[Kr]
The electron configuration of nobelium is [Rn]5f14.7s2.
1s2 2s2 2p63s2 3p6 3d104s2 4p4
The abbreviated electron configuration of cobalt is [Ar] 3d7 4s2.