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# 1s2 2s2 2p6 3s2 3p6

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When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. Junior high school answered give the valence electrons of the following electrons configuration 1. 1s2 2s2 2p6 2.

## 1s2 2s2 2p6 3s2 3p6 wyjaśnienie wideo

To figure this out the element with the electron config of we first count the electrons. Those are the small number placed at the top after the letters. For this element we have 2 + 2 + 6 + 2 + 6 + 2 + 6. That gives us a total of 18 electrons. In a neutral atom, electrons will equal the number of protons. On the periodic table we can usually find the atomic number above the element symbol. This is the same as the number of protons. In a neutral atom electrons = protons. Since we had 18 electrons, we therefore have 18 protons, and the element with atomic number 18 . We look up 18 on the periodic table and the element with the electron configuration of 1s22s22p63s23p6 is Argon (Ar). Helpful Videos: • Introduction to Writing Electron Configurations: youtu.be/J-v9_ieCqJI • Electron Configurations Chart: youtu.be/TjVrcw2sZLs • Writing Electron Configs Using only the Periodic Table: youtu.be/ououF9nHUhk • Order of d and s Orbital Filling: eic.rsc.org/Coature/the-trouble-with-the-aufbau-principle/2000133.article Sometimes we have ions, these aren’t neutral, they have a charge. You can tell bc there will be a + or – sign in the superscript after the element symbol. Neutral Elements: for example Na, Fe, N, O, H. All the elements as listed on the Periodic Table are neutral. Ions: for example Na+, Fe 3+, N 3-, O 2-, H+ . Ions are elements that have lost or gained electrons.

## Konkluzja

1s2 2s2 2p6 3s2 3p5 5. 1s2 2s2 2p6 7. 1s2 2s2 2p6 3s2 3p6 8. 1s2 2s2 2p6 3s1 9. For atoms with many electrons , this notation can become lengthy and so an abbreviated notation is. 1s2 2s2 2p6 3s2 3p2: 1s2 2s2 2p6 3s2 3p3: Boron helium, the next element, contains two electrons like alkali metals, hydrogen combines with electronegative elements to form oxides,. 1s2 2s2 2p6 3s2 3p3 5 électrons de valence couche de valence n = 3 numéro atomique z configuration électronique 1s2 2s1 1s2 2s2 2p5 1s2 2s2 2p6 3s2 3p6 des électrons ordonnés en 1913, le physicien danois n.