A322834 Regular triangle read by rows: T(n,k) is the k-th ionization energy of the n-th chemical element (in kJ/mol), rounded to the nearest integer.

1312, 2372, 5251, 520, 7298, 11815, 900, 1757, 14849, 21007, 801, 2427, 3660, 25026, 32827, 1087, 2353, 4621, 6223, 37831, 47277, 1402, 2856, 4578, 7475, 9445, 53267, 64360, 1314, 3388, 5301, 7469, 10990, 13327, 71330, 84078, 1681, 3374, 6050, 8408, 11023, 15164, 17868, 92038, 106434

Offset

1,1

Comments

The k-th ionization energy of an element X is the enthalpy change of X^((k-1)+) (g) -> X^(k+) (g) + e-.

Although many terms are known, T(30,22) is currently unknown, so the table stops at T(30,21) = 179100 for the time being.

Each row is strictly increasing. Moreover, it seems that there are big gaps between T(n,n-t-1) and T(n,n-t) for t = 2, 8, 18, ...

Links

Jianing Song, Table of n, a(n) for n = 1..456

Wikipedia, Ionization energies of the elements (data page)

Example

Table begins
(H)  1312,
(He) 2372, 5251
(Li)  520, 7298, 11815
(Be)  900, 1757, 14849, 21007
(B)   801, 2427,  3660, 25026, 32827
(C)  1087, 2353,  4621,  6223, 37831, 47277
(N)  1402, 2856,  4578,  7475,  9445, 53267, 64360
...

Crossrefs

First column is A320506.

Sequence in context: A256668 A205301 A320506 * A295562 A030646 A223612

Adjacent sequences: A322831 A322832 A322833 * A322835 A322836 A322837

Keyword

nonn,tabl

Author

Jianing Song, Dec 27 2018

Status

approved