Editing 2913: Periodic Table Regions
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| Don't bother learning their names β they're not staying long || Astatine and Period 7 from Rutherfordium onwards || Astatine, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicum, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson || These elements are hard to produce in large quantities and decay within hours or less... in some cases, milliseconds. (Their names haven't exactly been stable, either, with previous multiple systems of placeholder names. For example, dubnium has been called nielsbohrium, hahnium, joliotium, unnilpentium, and eka-tantalum.) | | Don't bother learning their names β they're not staying long || Astatine and Period 7 from Rutherfordium onwards || Astatine, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicum, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson || These elements are hard to produce in large quantities and decay within hours or less... in some cases, milliseconds. (Their names haven't exactly been stable, either, with previous multiple systems of placeholder names. For example, dubnium has been called nielsbohrium, hahnium, joliotium, unnilpentium, and eka-tantalum.) | ||
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β | | Whoever figures out a better way to fit these up there gets the next Nobel Prize || The internal transition metals || Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium|| The {{w|lanthanide}}s and {{w|actinide}}s are usually placed | + | | Whoever figures out a better way to fit these up there gets the next Nobel Prize || The internal transition metals || Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium|| The {{w|lanthanide}}s and {{w|actinide}}s are usually placed awkwardly "outside" of the main periodic table, most placements taking two elements out of their own row. There are alternative {{w|types of periodic tables}} with differing ways of displaying the elements, including some that [https://ptable.com/image/periodic-table-wide.svg keep the lanthanides and actinides in-line]; however, they are usually considered either less visually appealing or more difficult to understand. |
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