1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5s6 6s2 4f14 5d10 6p2, or more concisely [Xe] 6s2 4f14 5d10 6p2.
40K
For example a thorium isotope is Th-231 or 23190 Th.
The chemical notation is 19F.
This isotope is lead-206.
This symbol is Tc-99m.
40K
For example a thorium isotope is Th-231 or 23190 Th.
Th-234
The chemical notation is 19F.
K - 39
This isotope is lead-206.
The isotope of lead formed is stable. No other isotope in that decay chain is.
It is usually of the form 23Na where the 23 appears as a superscript.
It is usually of the form 23Na where the 23 appears as a superscript.
This symbol is Tc-99m.
Na-23
'Na' is the atomic notation of sodium. Hope this helps :)