#2723: Outdated Periodic Table
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[Subheading]: Figure 6.14
[Title]: The periodic table of the elements
[The following four rectangles featuring the large element abbreviation, with the full element name written below, in a typical periodic table style]
[Top row, far left]: H Hydrogen
[Top row, far right, detached from any other box]: He Helium
[Bottom row, attached directly below the "H" box]: Li Lithium
[Bottom row, attached directly to the right of "Li"]: Be Beryllium
[Caption below the panel]:
You can spot an outdated science textbook by checking the bottom of the periodic table for missing elements. For example, mine was published half an hour after the Big Bang.
(Sourced from explainxkcd.com)
Title text:Researchers claim to have synthesized six additional elements in the second row, temporarily named 'pentium' through 'unnilium'.