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( begin array l _ 20 A-1 s^ 2 2 s^ 2 2 p^ 6 3 s^ 2 3 p^ 6 4 s^ 2 _ 29 B-1 s^ 2 2 s^ 2 2 p^ 6 3 s^ 2 3 p^ 6 3 d^ 10 4 s^ 1 end array ) | Suva Ai