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∙ 11y agoTl, like the previous answerer said, would be -1 ion (81 electrons)
+1 ion = 1 electron less (cause it's one particle more positive) => 79Au.
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∙ 9y agoCerium is the element that has the electron configuration of Xe 6s2 5d1 4f1. Its atomic number isÊ58. It was named after the dwarf planet Ceres.
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∙ 13y agoEu - Europium
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∙ 12y agoPb (lead)
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∙ 13y agoTungsten
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What element has the outer electron configuration 6s2 4f8?
No element has this as the ground state. Gadolinium has the right number of electrons but its ground state is [Xe] 4f7 5d1 6s2. The second number in each group should be a superscript.
What is the abbreviated electron configuration of lawrencium?
Lanthanum has an atomic number of 57 and is the first element in the Lanthanoids. Its full orbital notation is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 5d1.
What is the electron configuration for La lanthanum?
[Xe] 6s25d1
What are the limitations of aufbau principle?
1. The Aufbau principle cannot be used to predict electron configuration of atoms on ionization. In other words, it does not tell us which electrons are to be removed when an ion is formed form an atom. For example, the configuration of Fe based on Aufbau principle is 1s2 2s2 2p6 3s2 3p6 4s2 3d6. It has been experimentally confirmed by spectral and magnetic studies than tFe2+ has configuration 1s2 2s2 2p6 3s2 3p6 3d6 and not 1s2 2s2 2p6 3s2 3p6 4s2 3d4. It means that ionization results in the loss of 4s electrons in preference to 3d electron even thought the 3d were the last to be added in building up the configuration of Fe atom. It means that in Fe2+ ,3d has lower energy than 4s which is contrary to Aufbau order of filling. This can be said of any transition element on ionization. 2. Although (n-1) d subshells and ns subshells lie quite close together , yet the former is somewhat higher in energy. Accordingly the predicted Aufbau outer configurations of Cr (Z = 34) is .....3d4 5s2 but the experimentally supported configuration is ....3d5 4s1. 3. In the sixth period , 4f and 5d subshells are exceedingly close in energy . At lanthanum (Z = 57),the last electron does not go to 4f as predicted in Aufbau order but is added to 5d subshell to give it a configuration ....4d10 5s3 5p6 5d1 6s3. However, the next electron for valium (Z =58) is added to the 4f subshell and the previous electron in 5d in lanthanum is also shifted to 4f to give it a configuration ....4d10 5s2 5d6 4f2 5d0 6s2. 4. The Aufbau order configuration of zirconium (Z =40) is ....5s2 4d2 and that the predicted order for the next element niobium Nb (Z =41) would be ...5s2 4d3 . However, the observed configuration of Nb is... 5s1 4d4. It is understandable that the next element molybdenum Mo (Z =42) acquires.....5s1 4d5 configuration due to higher stability associated with half-filled configuration. However, the next element technetium Tc (Z =43) with observed configuration 5s1 4d6 in place of predicated 5s2 4d6 shows that the preference for half-filled or completely-filled configuration is not the only controlling factor but some complex nucleus=electron and electron-electron forces also have some role to plat in deterring these configuration. 5. In case of palladium pd (Z=46), the predicted Aufbau configuration is 5s2 4d8 but the experimentally observed configuration is 5s0 4d10. This is perhaps the only case where the observed configuration has two misplaced electron.
How could electron configuration be used to predict relative atomic size?
the larger the highest energy level number, the larger the atomic radius
What is the electronic configuration of cerium?
[Xe]4f4
What is the atomic number of the first element to start filling an f sub-level?
The element cerium has a single electron in the 4f orbital. Its electron configuration is [Xe] 4f1 5d1 6s2.
Which element has the following configuration Xe6s24f15d1?
[Xe] 6s2 4f1 5d1.There are a total of 58 electrons. Or the atomic number is 58 and the element is Cerium
What is electron configuration of cesium?
[Xe] 6s2 5f1
What element has the outer electron configuration 6s2 4f8?
No element has this as the ground state. Gadolinium has the right number of electrons but its ground state is [Xe] 4f7 5d1 6s2. The second number in each group should be a superscript.
What is the complete electron configuration for lanthanum?
[Xe] 5d1 6s2 or 2, 8, 18, 18, 9, 2
What is the name of Xe 6s2?
that would not be an element itself, but a compound containing a few different elements: xenon, sulfur, and one undiscovered element ("F" does not currently exist)
What electrons are filling in the outer level of cerium energy level and sublevel type?
Cerium has an electronic configuration of [Xe] 4f1 5d1 6s2 It is a lanthanide with atomic number 58 Lanthanum atomic number 57 has [Xe] 5d1 6s2 Praseodymium atomic number 59 has [Xe] 4f3 6s2 Cerium is one of the lanthanides that are exceptions to the aufbau principle.
What is the noble gas configuration for lanthium?
[Xe] 5d1 6s2
What is the noble gas configuration for Lanthanum?
[Xe] 5d1 6s2
What is the abbreviated electron configuration of lawrencium?
Lanthanum has an atomic number of 57 and is the first element in the Lanthanoids. Its full orbital notation is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 5d1.
What is the electron configuration for La lanthanum?
[Xe] 6s25d1
