Six electron shells
The presumable valence of astatine is -1.
Astatine has 85 protons.
Arsenic has 8 levels of energy.
4
1. Naturally astatine is found in the decay series of uranium, thorium and actinium. 2. Artificially astatine is prepared by nuclear reactions between bismuth and alpha particles with very strong energy.
85
Astatine has 85 protons.
Bromine has FOUR energy Levels.
Arsenic has 8 levels of energy.
Astatine has 125 neutrons
There are 3 energy levels in Silicon. Which ever row it is in the Periodic Table, that is how many energy levels it has. The structure is 1s2 2s22p63s23p2
Silver has 5 energy levels. 😄
Platinum has six energy levels.
Electron shells of astatine: 2, 8, 18, 32, 18, 7 (electrons/shell)
it is in the second period. so boron has 2 energy levels
5
2
5