Talk:Periodic table

On the issue of numbering the shells of the layers of the electron cloud of atoms
In my opinion, it would be better to start the shell number of the electron cloud layer of the atom l not from zero, but from one. After all, the number of shells in a layer is equal to the layer number. The tradition of numbering shells from scratch, inherited from the beginning of the 19th century, is in contradiction with logically understandable numbering: 1, 2, 3, 4, 5, ... The number zero can be perceived as the absence of what is numbered in natural numbers. Alex makeyev (talk) 21:50, 9 February 2024 (UTC)


 * We can interpret the reason for the properties of halogen in hydrogen and the properties of noble gas in helium in this way. The missing p-shell in the first layer of the electron cloud of hydrogen and helium atoms is replaced by its s-shell for two finite elements of the virtual p-shell. Alex makeyev (talk) 05:50, 14 March 2024 (UTC)

My periodic table breakdown
Alkali metals - Li, Na, K, Rb, Cs, Fr

Alkaline earth metals - Be, Mg, Ca, Sr, Ba, Ra

F-block (lanthanides and actinides) - La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No

Transition metals - Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Lr, Rf, Db, Sg, Bh, Hs, Mt, Ds, Rg, Cn

Post-transition metals - Al, Ga, In, Sn, Tl, Pb, Bi, Nh, Fl, Mc, Lv, Ts

Metalloids - B, Si, Ge, As, Sb, Te, Po

Other nonmetals (including halogens) - H, C, N, O, F, P, S, Cl, Se, Br, I, At

Noble gases - He, Ne, Ar, Kr, Xe, Rn, Og

TheCool1Z (talk) 23:58, 21 February 2024 (UTC)


 * This is essentially no different to the breakdown shown in the Classification of elements section. — Sandbh (talk) 00:19, 3 March 2024 (UTC)

Strange lede sentence
Is it just me, or is it a bit strange to have the lede sentence describe the subject in a verb form (the periodic table arranges) instead of a noun form (the periodic table is an arrangement)? ￼

I propose that the lede sentence should be changed to: The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups").

Sincerely,✨ΩmegaMantis✨blather 21:36, 2 March 2024 (UTC)


 * Feel free to make it so. — Sandbh (talk) 23:10, 2 March 2024 (UTC)

Periodic table or periodic system?
It seems odd that periodic tables are sometimes referred to as periodic systems.

I say odd because a table is said to be:


 * "A systematic arrangement of numbers, words, symbols, etc., in a definite and compact form so as to show clearly some set of facts or relations."

So a table in this sense is a system.

Most periodic tables are tabular. And yes periodic tables come in all sorts of shapes. Yet furniture tables can be, for example, round, triangular, oval, wedge shaped or even spiral. They’re still all called tables, regardless of their shape.

While Mendeleev referred to his periodic "tables" as periodic systems he stuck with the tabular form all the way.

On the side of the cardboard box in which my Periodic Table Mug arrived are printed the following words: "The Periodic Table is a systematic arrangement of the elements…"

So, what gives? --- Sandbh (talk) 06:28, 18 May 2024 (UTC)