Editing 2723: Outdated Periodic Table

{{comic
| number    = 2723
| date      = January 11, 2023
| title     = Outdated Periodic Table
| image     = outdated_periodic_table_2x.png
| imagesize = 360x350px
| noexpand  = true
| titletext = Researchers claim to have synthesized six additional elements in the second row, temporarily named 'pentium' through 'unnilium'.
}}

==Explanation==
{{incomplete|Created by BERYLLIUM-BASED LIFE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic shows figure 6.14 from a science text book, which displays ''The periodic table of the elements'', but with only the first four elements are shown ({{w|Hydrogen}}, {{w|Helium}}, {{w|Lithium}} and {{w|Berylium}}). [[Randall]] claims, in the caption, that you can use the layout of an included {{w|Periodic table}} to date a publication based upon the elements present or missing. The joke here is that his book was somehow published just half an hour after the {{w|Big Bang}}, at which time those four elements were the only ones present.

From about 10 seconds until about 20 minutes after the Big Bang, the phase that is known as the {{w|Big Bang nucleosynthesis}} occurred. At that time, hydrogen ions (single photons) provided for helium in abundance and traces of lithium. Some berylium-7 was also formed, which is an unstable {{w|Isotopes of beryllium|isotope}}, and with a half life of 53 days, an appreciable amount of what had been created would still be there several months after the Big Bang, and certainly most of what was created would be there half an hour after.

The conclusion is that Randall's science book was published when those four elements were the only ones in existence, and before the point where practically all the beryllium had decayed. After that point, only the three first would be present, until star formation began and started the process of {{w|Stellar nucleosynthesis}}.

Of course no life as we know it could exist until long after stellar nucleosynthesis had created all the other elements needed to support {{w|Carbon-based life}}. And no life, as we could even imagine, would be able to exist for the first 370,000 years after Big Bang as atoms (in a form that could eventually form molecules) could not exist until the {{w|Recombination (cosmology)|Recombination}} phase of the universe, due to the high energy of the {{w|Cosmic background radiation}}. Textbooks, also being Carbon-based {{Citation needed}} could not exist either.

Even now, many {{w|Chemical elements|elements}} do not occur naturally on Earth and have to be {{w|Synthetic element|synthesized}} to be practically studied, or deduced from what was seen during their often short lives. Others were always very hard to detect, collect enough in pure form or purify enough to properly discover them. Until these elements were discovered, one way or another, they where not included in the periodic table. Various versions of the periodic table had left spaces for these {{w|Mendeleev's predicted elements|expected elements}}, but these are all now filled, and all recent changes have been additions to the end of the prior version of the table or possibly {{w|List of chemical element naming controversies|the names given}} to recent additions. As printed scientific textbooks do not update themselves after being published, one can determine the general age of the work by checking which elements were present in the periodic table that was included.

The title text refers to how yet-undiscovered elements are given a {{w|systematic element name}} as a temporary name, until a more permanent name is decided upon. The names are based upon a standard group of Greek and Latin roots (depicting the decimal digits used to 'spell out' an element's unique {{w|atomic number}}, i.e. the number of protons) and adding an -ium at the end. The claim in the title text is that, in the text book with the figure, researchers claim they have synthesized six additional elements in the second row, temporarily named 'pentium' (atomic number "5") through to 'unnilium' ("one zero", or "10"), just as element "118" was provisionally called "ununoctium". At the time of release of this comic, element 118 is currently the last confirmed element and has been officially called {{w|Oganesson}}. The title text of [[2639: Periodic Table Changes]], the previous comic to draw a periodic table, also refers to this.

Element number five is, in our time and reality, actually well known as {{w|Boron}}). (The 'provisional' name of {{w|Pentium}} was also used for a series of microprocessors launched by Intel in the 1990s, which Randall was almost certainly consciously making an oblique reference to.)  "Unnilium", element number 10, is {{w|Neon}}, that (along with other {{w|Noble gas}}es) was only discovered at the very end of the 19th century – this actually included helium. Despite helium being one of the first elements to exist, and still one of the most common in the universe (roughly 24%, by mass, with hydrogen being around 75% and every other element combined being the remainder), it did not appear in the earliest period tables. It was only first detected from afar, as a constituent of the Sun, about thirty years before it was finally physically discovered in an actual lab here on Earth. It is also possible that neon's provisional name in 'early science' might have been something more along the lines of "decium", all else being equal. 

Since life could not have existed at the time this book should have been published, the idea of researchers synthesizing elements, or indeed the existence of books or even researchers, is of course just part of the joke.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[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.

{{comic discussion}}
[[Category:Chemistry]]
[[Category:Cosmology]]