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The German edition.
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She was standing on an infinite checkerboard floor. Black and white tiles stretched in all directions, vanishing into a fog that hummed with a low, steady frequency. The air smelled of ozone and old paper. She clicked
The hydrogen atom bowed.
The checkerboard floor shuddered. A second figure materialized—a shimmering, ghostly sphere that resolved into a hydrogen atom, its electron a fuzzy cloud of probability. physikalische chemie atkins pdf download
"Professor Atkins?" she whispered.