![]() What element has this electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d6 iron What element has this electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d2 titaniumġ5 Determine which element is being represented by the electron configurations below. The math to explain this is complicated, but essentially it just takes less energy to make a new s sublevel than it does to make a d sublevel on the previous level.ġ4 1s2 2s2 2p6 3s2 3p6 4s2 3d6 iron 1s2 2s2 2p6 3s2 3p6 4s2 3d2 titanium The 4s sublevel is filled before the 3d sublevel. What element has the electron configuration below? 1s2 2s2 2p6 3s1 sodium What element has the electron configuration below? 1s2 2s2 2p5 fluorineġ3 This essentially becomes a counting exercise once you know how to use your periodic table, but there is one important catch. Notice that the 3p sublevel is not full for P.ġ2 1s2 2s2 2p6 3s1 sodium 1s2 2s2 2p5 fluorine We write its electron configuration like this: 1s2 2s2 2p6 3s2 3p3ġ1 1s2 - represents the first energy level with its s sublevelġs2 2s2 2p6 3s2 3p3 1s2 - represents the first energy level with its s sublevel 2s2 2p6 - represents a full second energy level showing its s and p sublevels 3s2 3p3 - represents the third energy level with its s and p sublevels. It is the 3rd element in the p sublevel on the 3rd row. ![]() We can determine the electron configuration of an element using the periodic table.ġ0 Phosphorous fills up the first two energy levels and lands in the p sublevel on the 3rd row. p s d fĩ Scientists show the arrangement of electrons in energy levels and energy sublevels through electron configurations. s + p = 8 electrons s + p + d = 18 electronsĨ Part of the way the periodic table is arranged is based on which sublevels are in the outer energy level of each elements atoms. The 3rd Energy Level has an s, p and d sublevel. s = 2 electrons The 2nd Energy Level has an s and p sublevel. Nucleus The 1st Energy Level only has an s sublevel. 4 Sublevels: s holds up to 2 electrons p holds up to 6 electrons d holds up to 10 electrons f holds up to 14 electronsħ Each energy level has an additional sublevel from the energy level before. The higher the energy level, the more sublevels it will have. There are _ sublevels that you need to be familiar with. nucleus 1st Energy Level 2nd Energy Level 3rd Energy Levelĥ Rows on the periodic table are known as periods.Īll of the elements in a period have the same number of energy levels.Ħ s holds up to 2 electrons p holds up to 6 electronsĮach energy level is broken down into sublevels. The black dots represent the electrons in that energy level. Each energy level is shown with a circle. When we draw atoms, we always have the nucleus in the middle. They organize themselves into energy levels. 3 5 2 1 6 8 4 7 Create Lewis Dot Diagrams for the elements below.Ĥ nucleus 1st Energy Level 2nd Energy Level 3rd Energy LevelĮlectrons are not flying around the nucleus without any order. The diagram shows the order that dots are placed around the element’s symbol. Lewis Dot Diagrams show the number of valence electrons in an element. 1 valence electron 2 valence electrons 3 valence electronsģ Create Lewis Dot Diagrams for the elements below. Presentation on theme: "Electron Configurations."- Presentation transcript:Ģ Valence electrons are the electrons in the
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