because of Hund-Mulliken theory rules
Writing at the beginning the adequate symbol of an noble gas, in square parenthesis.
The short hand configuration is also called noble gas configuration because it mimics the electron configuration of noble gases, which are chemically stable and have full valence shells. By using noble gas configurations, we can easily represent the electron arrangement of elements without writing out the entire electron configuration.
This is best explained by an example: The electron configuration of Strontium (Sr) is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 This can be simplified by using the noble gas that covers the most items. In this case it is Krypton (Kr) which has an electron configuration of: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 Do you see the similarity in the two configurations? This means that you can use [Kr] to represent 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 So the short-handed (simplified) way of writing Strontium is: [Kr] 5s^2 Everything before the 5s^2 was replaced with [Kr] Note: The "^" symbol means the the following number is in the form of a superscript.
"Noble gas configuration" means that in writing out an electron configuration for an atom, rather than writing out the occupation of each and every orbital specifically, you instead lump all of the core electrons together and designate it with the symbol of the corresponding noble gas on the periodic table (in brackets). For example, the noble gas configuration of nitrogen is [He]2s22p3
Two exceptions to the standard order of writing electron configurations are chromium (Cr) and copper (Cu). In chromium, instead of the expected configuration of [Ar] 4s² 3d⁴, the configuration is [Ar] 4s¹ 3d⁵ to achieve greater stability through half-filled subshells. Similarly, copper has an expected configuration of [Ar] 4s² 3d⁹, but it is actually [Ar] 4s¹ 3d¹⁰, as a fully filled d subshell also provides enhanced stability.
Because it is shorter and easier to write. Also saves time when compared to writing the complete electron configuration.
Three rules aufbau principle, the pauli exclusion,and the hunds rule
Writing at the beginning the adequate symbol of an noble gas, in square parenthesis.
In noble gas notation, you don't have to write the electron configuration up to that noble gas. You simply put the noble gas in brackets [noble gas] and then continue to write the electron configuration from that point. It just makes it shorter and easier to write electron configurations for elements with a lot of electrons.
The short hand configuration is also called noble gas configuration because it mimics the electron configuration of noble gases, which are chemically stable and have full valence shells. By using noble gas configurations, we can easily represent the electron arrangement of elements without writing out the entire electron configuration.
This is best explained by an example: The electron configuration of Strontium (Sr) is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 This can be simplified by using the noble gas that covers the most items. In this case it is Krypton (Kr) which has an electron configuration of: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 Do you see the similarity in the two configurations? This means that you can use [Kr] to represent 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 So the short-handed (simplified) way of writing Strontium is: [Kr] 5s^2 Everything before the 5s^2 was replaced with [Kr] Note: The "^" symbol means the the following number is in the form of a superscript.
"Noble gas configuration" means that in writing out an electron configuration for an atom, rather than writing out the occupation of each and every orbital specifically, you instead lump all of the core electrons together and designate it with the symbol of the corresponding noble gas on the periodic table (in brackets). For example, the noble gas configuration of nitrogen is [He]2s22p3
Two exceptions to the standard order of writing electron configurations are chromium (Cr) and copper (Cu). In chromium, instead of the expected configuration of [Ar] 4s² 3d⁴, the configuration is [Ar] 4s¹ 3d⁵ to achieve greater stability through half-filled subshells. Similarly, copper has an expected configuration of [Ar] 4s² 3d⁹, but it is actually [Ar] 4s¹ 3d¹⁰, as a fully filled d subshell also provides enhanced stability.
what important learnings did you realize when writing your iep
The noble gas structure refers to the electron configuration of noble gases, such as helium, neon, and argon. These gases have a stable configuration with a full outer shell of electrons, making them chemically inert and less likely to react with other elements. This stability is a result of having the maximum number of electrons allowed in their outermost energy level.
The writing.
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