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Writing electronic configurations - Contenido educativo
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Hello class in this video I'm going to teach you how to get the electronic
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configuration for some elements depending on the different energy of the
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orbitals and how to write it. So let's start with something simple okay let's
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start for example with this element phosphorus okay phosphorus you can
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look it up in the periodic table has an atomic number of 15 which means
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that its nucleus has 15 protons and it has 15 electrons in the cell that we
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place in the different orbitals. So we are going to start counting electrons.
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Remember we are going to represent electrons like these little arrows
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upwards and downwards and we're going to place them here in these boxes that are
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the orbitals. So we start here with 1s, one, two electrons. So the first two
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electrons of this 15 go to the 1s orbital, we write that
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information as this, we go on, more electrons here, more here, okay let's
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count how many we have for the moment, it was 2 and 2, 4 and 6 more here, that is
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10 we are now we have 10 electrons we indicate the 2s of electrons like this and the 2p electrons
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we indicate like this still five electrons to go so i need to place five electrons more
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so two go here i have 12 right now and i have three left one two and three and we're done
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we finish how do we write this so in the 3s orbital i have two electrons and then in the
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three p orbitals i have three electrons this is the electronic configuration for phosphorus
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okay let's go with another element a little more with more electrons like
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ion okay ion has an atomic number of 26 meaning that i have to place 26 electrons in its orbitals
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i'm going to use this i have already placed 15 so i still have 11 electrons to go
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okay so this is 12 as you can see here i have three here not to place three more
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okay so it's 3p6 right now i have 18 electrons still eight electrons to place and then
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there is a significant jump instead of filling the 3d after the 3p 4s
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go first because it has less energy you can see it's it's down in the diagram in the diagram
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it's below 3d so it's 4s2 okay and we have a still let's say i say this was 10
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still six electrons to uh yes six select six electrons electrons to go and this is
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electrons are going to go here one two three four five and six and they represented like this
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three six okay so to write the electronic configuration of an element i only need to
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know how many electrons the element has and how to distribute this and what is the
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difference energy of the orbitals goodbye
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- Idioma/s:
- Autor/es:
- Juan Carlos Fajardo
- Subido por:
- Juan C. F.
- Licencia:
- Reconocimiento - Compartir igual
- Visualizaciones:
- 78
- Fecha:
- 24 de octubre de 2020 - 18:28
- Visibilidad:
- Público
- Centro:
- IES CLARA CAMPOAMOR
- Duración:
- 04′ 08″
- Relación de aspecto:
- 17:9 Es más ancho pero igual de alto que 16:9 (1.77:1). Se utiliza en algunas resoluciones, como por ejemplo: 2K, 4K y 8K.
- Resolución:
- 1920x1008 píxeles
- Tamaño:
- 12.39 MBytes
