1s2 2s2 2p6 3s2 3p6 3d7 4s2
Alternatively,
[Ar] 3d7 4s2
[Ar]3d74s2
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.
Co is cobalt and is not a noble gas. Cobalt is a transition metal. Its electron configuration is [Ar]3d74s2.
[Ar] 4s2 3d7
[Ar] 4s2 3d7
[Ar] 4s2 3d7
[Ar]3d74s2
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.