Talk:Ununennium

Ununennium has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.

Ununennium is part of the Alkali metals series, a good topic. This is identified as among the best series of articles produced by the Wikipedia community. If you can update or improve it, please do so.

Article milestones
Date	Process	Result
October 4, 2015	Good article nominee	Listed
December 21, 2016	Good topic candidate	Promoted

A fact from this article appeared on Wikipedia's Main Page in the "Did you know?" column on November 17, 2015.

The text of the entry was: Did you know ... that ununennium is the element with the lowest atomic number that has not yet been synthesized?

Current status: Good article

Archives

Archive 1

This page has archives. Sections older than 100 days may be automatically archived by when more than 4 sections are present.

What about the neutrons of the atom?

How many neutrons does Ununennium have? (predicted is okay with me BTW.) Mariomaker-4 (talk) 14:41, 25 March 2023 (UTC)[reply]

Ununennium hasn't been synthesized yet, and predictions vary considerably for which isotopes may be longest-lived. In practice, should the ongoing attempt to synthesize ununennium from curium-248 and vanadium-51 be successful, the resulting isotopes ²⁹⁵Uue and ²⁹⁶Uue would respectively have 176 and 177 neutrons. ^Complex/_Rational 20:24, 25 March 2023 (UTC)[reply]

Thank you! Mariomaker-4 (talk) 18:11, 27 March 2023 (UTC)[reply]

Element 110-14

This citation is old. No island exists between those discovered elements 2601:5C0:C280:DB80:4CF4:74AB:9D73:4FC3 (talk) 21:42, 28 February 2024 (UTC)[reply]

The pages for those elements state that some undiscovered isotopes of these elements with more neutrons may have relatively long half-lives. We don't have enough experimental evidence to firmly conclude where the island exists. ^Complex/_Rational 23:06, 28 February 2024 (UTC)[reply]

Alternative Theoretical Prediction

Proposed Addition: Alternative Theoretical Prediction from Tribernachi Theory

Request: Expand the "Predicted properties" section to include a brief summary of an alternative theoretical model.

Suggested Text for Inclusion

Alternative Theoretical Predictions

In addition to conventional quantum mechanical and relativistic predictions, an emerging model called Tribernachi Theory offers an alternative framework for estimating the properties of Ununennium. Tribernachi Theory posits that atomic structures follow discrete whole-number relationships governed by a numerical sequence akin to the Tribonacci series. According to this framework, Ununennium is predicted to have:

An atomic weight of approximately 388 amu, derived from prime-ratio scaling among alkali metals;
An atomic radius of approximately 279 picometers (pm);
A low first ionization energy, as part of a descending whole-number trend across temporal frequency domains.

These estimates diverge from standard predictions, which place the atomic weight closer to 315 amu and estimate the radius and ionization energy using relativistic quantum mechanics. The Tribernachi approach aims to identify deeper mathematical structure in elemental periodicity, particularly for superheavy elements.

Rationale

Provides balanced and clearly labeled alternative viewpoint in a scientific context.
Complies with WP:NPOV by identifying the material as theoretical and speculative.
Adds breadth to the article’s scientific scope, especially in the absence of empirical data.
Sources are recent, properly attributed, and publicly available.

Mark (talk) 23:11, 15 April 2025 (UTC)[reply]