A magnesium atom has 2 electrons in its valence shell. A magnesium ion has 8 electrons in its valence shell.
Helium has two valence electrons. O6+ ion (a hypothetical ion) will also have 2 valence electrons.
Halides have 7 valence electrons, but the halide ion, haven gained an electron has 8 valence electrons
The hydrogen ion H+ is without electrons.
A hydrogen ion has zero valence electrons. Valence electrons are the electrons in the outermost shell of an atom, but since a hydrogen ion has lost its only electron, it does not have any valence electrons.
The ion ICl4- is called tetrachloroiodate(1-) ion.
Chlorine has 7 valence electrons. A chloride ion has 8.
Arsenide ion has 3 valence electrons. Arsenic, the element from which arsenide ion is derived, is in group 15 of the periodic table, so it has 5 valence electrons. When it forms an ion with a charge of -3, it gains 3 electrons to achieve a full octet.
A magnesium atom has 2 electrons in its valence shell. A magnesium ion has 8 electrons in its valence shell.
A sulfur atom has 6 valence electrons, while a sulfide ion has 8 valence electrons because it gains two electrons to achieve a stable electron configuration.
A chlorine atom has 7 valence electrons, as it is in group 17 of the periodic table. A chloride ion has 8 valence electrons, as it gains an additional electron to achieve a full octet and a stable electron configuration.
A neutral iodine atom has 7 electrons in its valence shell. When iodine forms an ion with a charge of -1, it gains an extra electron, making a total of 8 electrons in its valence shell.
Sulfur (S) has 6 valence electrons. The S2- ion gains two electrons, bringing the total to 8 valence electrons.
Hydrogen has 1 valence electron, phosphorus has 5 valence electrons, and oxygen has 6 valence electrons. So, if you totaled all of the valence electrons in the ion HPO42- you'd get 1 + 5 + 6 X 4 + 2 = 32. However, you should realize that the term "valence electron" really only applies to individual atoms, not compounds. The only electrons one would concern themselves with in the HPO42- ion are the 2 that make it an ion.
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A chloride ion has 18 valence electrons. It gains one electron to achieve a full octet, which is the stable electron configuration of the nearest noble gas, argon, which has 18 electrons.
ICl4-'s electron domain geometry is octahedral.