Phosphorus (P) because of the 5 valence electrons total, 3 of them are in the 3p sublevel, and according to Hund's rule, they "single-fill" each orbital first.
The element sulfur (S) has 16 electrons. It has 2 electrons in its first energy level, 8 electrons in its second energy level, and 6 electrons in its third energy level.
Phosphorus has five electrons in the third energy level (n=3).
I assume you mean for each atom. If I remember correctly, the shells go 2, 8, then 18 on the third layer.
The element with 2 valence electrons on the third energy level is magnesium. Magnesium has an electron configuration of 2-8-2, with 2 electrons on the outermost energy level.
The correct electron configuration for an element with 5 electrons in the third energy level is 1s2 2s2 2p6 3s2. This configuration follows the Aufbau principle, which dictates the filling order of electrons in an atom's energy levels.
Boron
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In a sulfur atom, the third energy level can contain a maximum of 18 electrons. The electrons are distributed among the different orbitals in the third energy level according to the rules of electron configuration.
Eight
Mg -magnesium.
The element sulfur (S) has 16 electrons. It has 2 electrons in its first energy level, 8 electrons in its second energy level, and 6 electrons in its third energy level.
Phosphorus has five electrons in the third energy level (n=3).
I assume you mean for each atom. If I remember correctly, the shells go 2, 8, then 18 on the third layer.
The element with 2 valence electrons on the third energy level is magnesium. Magnesium has an electron configuration of 2-8-2, with 2 electrons on the outermost energy level.
The element with five electrons in the third energy level (n=3) is phosphorus (P). In its electron configuration, phosphorus has the atomic number 15, with the distribution of electrons as 1s² 2s² 2p⁶ 3s² 3p³. Thus, it has five electrons in the third energy level (2 in the 3s subshell and 3 in the 3p subshell).
The correct electron configuration for an element with 5 electrons in the third energy level is 1s2 2s2 2p6 3s2. This configuration follows the Aufbau principle, which dictates the filling order of electrons in an atom's energy levels.
Iron has 26 electrons. The third energy level can hold a maximum of 18 electrons. Therefore, there are 18 electrons on the third energy level of iron.