W / o resorting to the authority of Google to settle the dispute on
tap-l, I appeal to the wisdom of phys-l. (especially the chemist
among us)
Which has a larger atomic radius H or He? The question relates to
leakage in spectrum tubes. One claims goes smaller left to right
(greater Z in nucleus) while another appeals to greater electronic
shielding, Both ignore a possible effect of a "filled" shell.
bc even too lazy to look in his Eisberg & Resnick "Quantum Physics"
and read Schiff over 50 years ago
p.s. Is assuming energy equipartition important in leakage?