More Red Hot

Here is a table of Van der Waals radii also from https://en.wikipedia.org/wiki/Atomic_radii_of_the_elements_(data_page)

atomic number	symbol	name	van der Waals pm	f_osc (10^14 Hz)	hf_osc eV
1	H	hydrogen	120	0.6860	0.284
2	He	helium	140	0.6351	0.263
3	Li	lithium	182	0.5570	0.230
4	Be	beryllium	153	0.6075	0.251
5	B	boron	192	0.5423	0.224
6	C	carbon	170	0.5763	0.238
7	N	nitrogen	155	0.6036	0.250
8	O	oxygen	152	0.6095	0.252
9	F	fluorine	147	0.6198	0.256
10	Ne	neon	154	0.6056	0.250
11	Na	sodium	227	0.4988	0.206
12	Mg	magnesium	173	0.5713	0.236
13	Al	aluminium	184	0.5540	0.229
14	Si	silicon	210	0.5186	0.214
15	P	phosphorus	180	0.5601	0.232
16	S	sulfur	180	0.5601	0.232
17	Cl	chlorine	175	0.5681	0.235
18	Ar	argon	188	0.5481	0.227
19	K	potassium	275	0.4532	0.187
20	Ca	calcium	231	0.4944	0.204
21	Sc	scandium	211	0.5173	0.214
22	Ti	titanium	no data	no data	no data
23	V	vanadium	no data	no data	no data
24	Cr	chromium	no data	no data	no data
25	Mn	manganese	no data	no data	no data
26	Fe	iron	no data	no data	no data
27	Co	cobalt	no data	no data	no data
28	Ni	nickel	163	0.5886	0.243
29	Cu	copper	140	0.6351	0.263
30	Zn	zinc	139	0.6374	0.264
31	Ga	gallium	187	0.5495	0.227
32	Ge	germanium	211	0.5173	0.214
33	As	arsenic	185	0.5525	0.228
34	Se	selenium	190	0.5452	0.225
35	Br	bromine	185	0.5525	0.228
36	Kr	krypton	202	0.5287	0.219
37	Rb	rubidium	303	0.4317	0.179
38	Sr	strontium	249	0.4762	0.197
39	Y	yttrium	no data	no data	no data
40	Zr	zirconium	no data	no data	no data
41	Nb	niobium	no data	no data	no data
42	Mo	molybdenum	no data	no data	no data
43	Tc	technetium	no data	no data	no data
44	Ru	ruthenium	no data	no data	no data
45	Rh	rhodium	no data	no data	no data
46	Pd	palladium	163	0.5886	0.243
47	Ag	silver	172	0.5730	0.237
48	Cd	cadmium	158	0.5978	0.247
49	In	indium	193	0.5409	0.224
50	Sn	tin	217	0.5101	0.211
51	Sb	antimony	206	0.5236	0.217
52	Te	tellurium	206	0.5236	0.217
53	I	iodine	198	0.5340	0.221
54	Xe	xenon	216	0.5113	0.211
55	Cs	caesium	343	0.4058	0.168
56	Ba	barium	268	0.4590	0.190
57	La	lanthanum	no data	no data	no data
58	Ce	cerium	no data	no data	no data
59	Pr	praseodymium	no data	no data	no data
60	Nd	neodymium	no data	no data	no data
61	Pm	promethium	no data	no data	no data
62	Sm	samarium	no data	no data	no data
63	Eu	europium	no data	no data	no data
64	Gd	gadolinium	no data	no data	no data
65	Tb	terbium	no data	no data	no data
66	Dy	dysprosium	no data	no data	no data
67	Ho	holmium	no data	no data	no data
68	Er	erbium	no data	no data	no data
69	Tm	thulium	no data	no data	no data
70	Yb	ytterbium	no data	no data	no data
71	Lu	lutetium	no data	no data	no data
72	Hf	hafnium	no data	no data	no data
73	Ta	tantalum	no data	no data	no data
74	W	tungsten	no data	no data	no data
75	Re	rhenium	no data	no data	no data
76	Os	osmium	no data	no data	no data
77	Ir	iridium	no data	no data	no data
78	Pt	platinum	175	0.5681	0.235
79	Au	gold	166	0.5833	0.241
80	Hg	mercury	155	0.6036	0.250
81	Tl	thallium	196	0.5368	0.222
82	Pb	lead	202	0.5287	0.219
83	Bi	bismuth	207	0.5223	0.216
84	Po	polonium	197	0.5354	0.221
85	At	astatine	202	0.5287	0.219
86	Rn	radon	220	0.5066	0.210
87	Fr	francium	348	0.4028	0.167
88	Ra	radium	283	0.4467	0.185
89	Ac	actinium	no data	no data	no data
90	Th	thorium	no data	no data	no data
91	Pa	protactinium	no data	no data	no data
92	U	uranium	186	0.5510	0.228
93	Np	neptunium	no data	no data	no data
94	Pu	plutonium	no data	no data	no data
95	Am	americium	no data	no data	no data
96	Cm	curium	no data	no data	no data
97	Bk	berkelium	no data	no data	no data
98	Cf	californium	no data	no data	no data
99	Es	einsteinium	no data	no data	no data
100	Fm	fermium	no data	no data	no data
101	Md	mendelevium	no data	no data	no data
102	No	nobelium	no data	no data	no data
103	Lr	lawrencium	no data	no data	no data
104	Rf	rutherfordium	no data	no data	no data
105	Db	dubnium	no data	no data	no data
106	Sg	seaborgium	no data	no data	no data
107	Bh	bohrium	no data	no data	no data
108	Hs	hassium	no data	no data	no data
109	Mt	meitnerium	no data	no data	no data
110	Ds	darmstadtium	no data	no data	no data
111	Rg	roentgenium	no data	no data	no data
112	Cn	copernicium	no data	no data	no data
113	Nh	nihonium	no data	no data	no data
114	Fl	flerovium	no data	no data	no data
115	Mc	moscovium	no data	no data	no data
116	Lv	livermorium	no data	no data	no data
117	Ts	tennessine	no data	no data	no data
118	Og	oganesson	no data	no data	no data

For metals with obtainable data to be compared, measured threshold frequencies for photoelectric effect are about twenty \((\approx 20)\) times higher than the data here.  This corresponds to an \(a_{\psi}\) about four hundred \((\approx 20^2)\) times smaller than the radii data presented here; where,

\(f_{osc}=c\sqrt{\cfrac{2\pi}{a_{\psi}}}\)

Good night