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Revision as of 17:54, 25 October 2020 by imported>DePiep (→Selected elements)
Selected elements
- Oct 2020
- Developmente state. This background color shows the new rows.
- To compare old row with new row per element, click sort by Z.
Footnotes NEW
- Notation forms
[lower-alpha 2] [lower-alpha 3] [lower-alpha 6]
Notes
- ↑ s.a.w. conventional, abridged
- ↑ 2.0 2.1 [ ] — massnumber. Element has no stable isotope. [204] is mass number is of the most stable isotope
- ↑ 3.0 3.1 ( ) — prediction
- ↑ Helium: does not solidify at a pressure of 1 bar (0.99 atm). Helium can only solidify at pressures above 25 atmospheres, which corresponds to a melting point of absolute zero (0 K).
- ↑ Arsenic: element sublimes at one atmosphere of pressure.
- ↑ 6.0 6.1 Abundance is –: Superheavy elements, with Z = 95 and above, do not occur naturally. They can be produced synthetically.
- ↑ Unless otherwise indicated, elements are primordial – they occur naturally, and not through decay.
- ↑ This element is transient – it occurs only through decay (and in the case of plutonium, also in traces deposited from supernovae onto Earth).
Header, footnotes OLD
- OLD header
List of chemical elements | ||||||||||||
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Z[upper-roman 1] | Symbol | Element | Origin of name[3][4] | Group | Period | Atomic weight[5][6] | Density | Melting point[7] | Boiling point | C[upper-roman 1] | [[Electronegativity|ElectroTemplate:Shynegativity]] | Abundance in Earth's crust[upper-roman 2] |
(u) | (Template:Sfrac) | (K) | (K) | (Template:Sfrac) | (Template:Sfrac) | |||||||
- [upper-roman 2] in old header
- [upper-roman 1] in old header
Notes
- ↑ 1.0 1.1 1.2 1.3 Z is the standard symbol for atomic number; C is the standard symbol for heat capacity
- ↑ 2.0 2.1 2.2 Unless otherwise indicated, elements are primordial – they occur naturally, and not through decay.
- ↑ The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, four such elements, bismuth, thorium, protactinium, and uranium, have characteristic terrestrial isotopic compositions, and thus their standard atomic weights are given.
- ↑ The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.
- ↑ The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.
- ↑ The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.
- ↑ The atomic weight of commercial lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.
- ↑ Helium does not solidify at a pressure of one atmosphere. Helium can only solidify at pressures above 25 atmospheres, which corresponds to a melting point of absolute zero.
- ↑ This element sublimes at one atmosphere of pressure.
- ↑ The value listed is the conventional atomic-weight value suitable for trade and commerce. The actual value may differ depending on the isotopic composition of the sample. Since 2009, IUPAC provides the standard atomic-weight values for these elements using the interval notation. The corresponding standard atomic weights are:
- Hydrogen: [1.00784, 1.00811]
- Lithium: [6.938, 6.997]
- Boron: [10.806, 10.821]
- Carbon: [12.0096, 12.0116]
- Nitrogen: [14.00643, 14.00728]
- Oxygen: [15.99903, 15.99977]
- Magnesium: [24.304, 24.307]
- Silicon: [28.084, 28.086]
- Sulfur: [32.059, 32.076]
- Chlorine: [35.446, 35.457]
- Argon: [39.792, 39.963]
- Bromine: [79.901, 79.907]
- Thallium: [204.382, 204.385]
- ↑ The value has not been precisely measured, usually because of the element's short half-life; the value given in parentheses is a prediction.
- ↑ Copernicium, with error bars: 283±11 K and 340±10 K respectively. The best experimental value for the boiling point of copernicium is 357+112
−108 K. - ↑ This predicted value is for solid oganesson, not gaseous oganesson.
- ↑ This element is synthetic – the transuranic elements 95 and above do not occur naturally, but they can all be produced artificially.
- ↑ This element is transient – it occurs only through decay (and in the case of plutonium, also in traces deposited from supernovae onto Earth).
- ↑ With error bars: 350±30 K.
- ↑ 1.0 1.1 Cite error: Invalid
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The above documentation is transcluded from Template:List of chemical elements/doc. (edit | history) Editors can experiment in this template's sandbox (create | mirror) and testcases (edit) pages. Please add categories to the /doc subpage. Subpages of this template. |
- ↑ "Periodic Table – Royal Society of Chemistry". www.rsc.org.
- ↑ "Online Etymology Dictionary". etymonline.com.
- ↑ "Periodic Table – Royal Society of Chemistry". www.rsc.org.
- ↑ "Online Etymology Dictionary". etymonline.com.
- ↑ Wieser, Michael E.; et al. (2013). "Atomic weights of the elements 2011 (IUPAC Technical Report)". Pure Appl. Chemistry. 85 (5): 1047–1078. doi:10.1351/PAC-REP-13-03-02. (for standard atomic weights of elements)
- ↑ Sonzogni, Alejandro. "Interactive Chart of Nuclides". National Nuclear Data Center: Brookhaven National Laboratory. Retrieved 2008-06-06. (for atomic weights of elements with atomic numbers 103–118)
- ↑ Holman, S. W.; Lawrence, R. R.; Barr, L. (1 January 1895). "Melting Points of Aluminum, Silver, Gold, Copper, and Platinum". Proceedings of the American Academy of Arts and Sciences. 31: 218–233. doi:10.2307/20020628. JSTOR 20020628.