Extended periodic table and Primordial nuclide

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Difference between Extended periodic table and Primordial nuclide

Extended periodic table vs. Primordial nuclide

An extended periodic table theorizes about elements beyond oganesson (beyond period 7, or row 7). In geochemistry, geophysics and geonuclear physics, primordial nuclides, also known as primordial isotopes, are nuclides found on Earth that have existed in their current form since before Earth was formed.

Alpha decay

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into an atom with a mass number that is reduced by four and an atomic number that is reduced by two.

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Chemical element

A chemical element is a species of atoms having the same number of protons in their atomic nuclei (that is, the same atomic number, or Z).

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Electronvolt

In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).

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Half-life

Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half its initial value.

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Mercury (element)

Mercury is a chemical element with symbol Hg and atomic number 80.

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Nature (journal)

Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.

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Nuclear isomer

A nuclear isomer is a metastable state of an atomic nucleus caused by the excitation of one or more of its nucleons (protons or neutrons).

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Nuclide

A nuclide (from nucleus, also known as nuclear species) is an atomic species characterized by the specific constitution of its nucleus, i.e., by its number of protons Z, its number of neutrons N, and its nuclear energy state.

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Radioactive decay

Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.

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Radium

Radium is a chemical element with symbol Ra and atomic number 88.

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Thorium

Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90.

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Uranium

Uranium is a chemical element with symbol U and atomic number 92.

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