div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader042vdocumentsusreader042viewer2022020312575067c01a28ab0f07acfbf7html5page1jpg target=_blank img data-url=the-fundamental-level-of-the-iron-atomhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The Fundamental Level of the Iron Atom loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsusreader042viewer2022020312575067c01a28ab0f07acfbf7html5thumbnails1jpg width=140 height=200 adivp© 1926 Nature Publishing Grouppdiv