24 lines
818 B
Julia
24 lines
818 B
Julia
const limits = [3:10, 11:18, 19:36, 37:54, 55:86, 87:118]
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function periodic_table(n)
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(n < 1 || n > 118) && error("Atomic number is out of range.")
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n == 1 && return [1, 1]
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n == 2 && return [1, 18]
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57 <= n <= 71 && return [8, n - 53]
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89 <= n <= 103 && return [9, n - 85]
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row, limitstart, limitstop = 0, 0, 0
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for i in eachindex(limits)
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if limits[i].start <= n <= limits[i].stop
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row, limitstart, limitstop = i + 1, limits[i].start, limits[i].stop
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break
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end
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end
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return (n < limitstart + 2 || row == 4 || row == 5) ?
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[row, n - limitstart + 1] : [row, n - limitstop + 18]
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end
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for n in [1, 2, 29, 42, 57, 58, 59, 71, 72, 89, 90, 103, 113]
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rc = periodic_table(n)
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println("Atomic number ", lpad(n, 3), " -> ($(rc[1]), $(rc[2]))")
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end
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