Fe³⁺ +e⁻ -> Fe²⁺ is the half reaction equation represents the reduction of an iron(II) ion
When an element or a compound gain electron , decreasing its oxidation number is called reduced and the half cell reaction is called Reduction reaction.
Fe³⁺ +e⁻ -> Fe²⁺ , Option C
In this reaction the Iron is gaining electron and the charge is getting reduced from +3 to +2 .
Therefore this half reaction equation represents the reduction of an iron(II) ion.
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Permeability
Ductility
Not able to conduct heat
Explanation:
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The number of valence electrons that a neutral atom of aluminum has is 3 valence electrons.
Valence electrons are those electrons in the outermost parts of elements that can be combined or loned to other elements during chemical reactions. Aluminum has three electrons in the valence shell.
The total number of electrons that aluminum has is 13 and the 3P1 shell has three electrons. So, this is the number of valence electrons.
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Answer:
Aluminum has 13 electrons in a neutral atom. The 1S2, 2S2 and 2P6 shells are full, and so is the 3S2. The 3P1 shell has one electron in it (in Al's neutral atom) and that gives aluminum one lone valence electron and two "semi-valence" electrons which can be loaned out.
Explanation:
Dimitri Mendeleev arranged the elements according to atomic mass and predicted the properties of missing elements. His table, known as the periodic table, was later validated and is now widely used in chemistry. The modern version is organized by atomic number and period.
The arrangement of elements according to atomic mass and the prediction of properties of missing elements was conducted by Dimitri Mendeleev in Russia in 1869. Together with Lothar Meyer from Germany, they recognized the periodic relationship among the known elements at that time. However, Mendeleev went a step further to use his table to predict the existence of elements that had properties similar to known ones such as aluminum and silicon.
Mendeleev's predictions were later validated with the discoveries of gallium in 1875 and germanium in 1886. These discoveries lent great credibility to Mendeleev's work. Today, the periodic table is arranged according to atomic number, following the periodic law. This law states that the properties of elements are periodic functions of their atomic numbers.
Importantly, the periodic table is far more than just an arrangement of elements. It's a vital tool in chemistry that helps predict the chemical behavior of elements and compounds.
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