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  2. Electron shell - Wikipedia

    en.wikipedia.org/wiki/Electron_shell

    A useful guide when understanding electron shells in atoms is to note that each row on the conventional periodic table of elements represents an electron shell. Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight electrons, the third shell can hold up to 18 ...

  3. Electron configuration - Wikipedia

    en.wikipedia.org/wiki/Electron_configuration

    For atoms with many electrons, this notation can become lengthy and so an abbreviated notation is used. The electron configuration can be visualized as the core electrons, equivalent to the noble gas of the preceding period, and the valence electrons: each element in a period differs only by the last few subshells. Phosphorus, for instance, is ...

  4. Electron configurations of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Electron_configurations_of...

    For each atom the subshells are given first in concise form, then with all subshells written out, followed by the number of electrons per shell. For phosphorus (element 15) as an example, the concise form is [Ne] 3s 2 3p 3.

  5. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    This can hold up to two electrons. The second shell similarly contains a 2s orbital, and it also contains three dumbbell-shaped 2p orbitals, and can thus fill up to eight electrons (2×1 + 2×3 = 8). The third shell contains one 3s orbital, three 3p orbitals, and five 3d orbitals, and thus has a capacity of 2×1 + 2×3 + 2×5 = 18. The fourth ...

  6. Energy level - Wikipedia

    en.wikipedia.org/wiki/Energy_level

    Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2n 2 electrons. [1]

  7. Colorado snow forecast: Multiple feet expected in the Rockies ...

    www.aol.com/colorado-snow-forecast-multiple-feet...

    Snow is forecasted near Pueblo, Colorado in both the higher and lower terrain between Tuesday night, Nov, 26, 2024 through Wednesday night.

  8. Period (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Period_(periodic_table)

    Each diagonal corresponds to a different value of n + l. Modern quantum mechanics explains these periodic trends in properties in terms of electron shells. As atomic number increases, shells fill with electrons in approximately the order shown in the ordering rule diagram. The filling of each shell corresponds to a row in the table.

  9. Mortgage and refinance rates for Nov. 21, 2024: Average rates ...

    www.aol.com/finance/mortgage-and-refinance-rates...

    A mortgage point could cost 1% of your mortgage amount, which means about $5,000 on a $500,000 home loan, with each point lowering your interest rate by about 0.25%, depending on your lender and loan.