Ions with 18 electrons are exceptions (ex.: Cl-).
Oxidation is loss of electrons and reduction is gain of electrons. In this case the Cl2 molecule is changed to two Cl- ions by gaining electrons, so the Cl2 is reduced. The Br in the NaBr salt is in the form of Br- ions. The Br- ions are changed to neutral Br atoms (a Br2 molecule) by losing electrons and so are oxidised.
Electrons
Ions have an imbalance of charge, with either an excess or shortage of electrons.
Ions are the formation of unbalanced atoms due to an attraction caused by a near completion of an electron ring in one atom and extra or valence electrons in the outer ring of another. If an atom gains an extra electron its over all charge is negative and the opposite is true for the atom gaining an electron.
Look at periodic table (see link). Left side gives up electrons (positive ions) Right side collects electrons (negative ions) (Except far right - no reaction, no ions)
17 protons and 18 electrons
chlorine ion has 17 protons and 18 electrons.
Ar0 there is no ions formed because it is already stable.
Ca2+ is one of them This is because the mass number of Argon (which is 18) lost 2 electrons (which has a negative charge). Without the impedance of the negative charge, Argon's mass number becomes 20 (instead of 18) and it acts like Calcium (which has the mass number of 20). You can probably figure out the rest of them from the above.
Yes. Argon is the only neutral element with 18 electrons. However, there can be other ions that can be isoelectronic (having same number of electrons) with argon. Cations such as K+, Ca2+ or Sc3+ have 18 electrons. Anions such as Cl-, S2- or P3- have 18 electrons.
The Sulfide ion, S2-, is isoelectronic with Cl-
The two groups that do not usually form ions include Group 14 and Group 18. Group 14 does not form ions. They do not gain or lose electrons either. Group 18 does not form ions because they contain stable noble gases.
Ions that are deficient in electrons are called cations. Cations have a positive charge due to the lack of electrons compared to the number of protons in the nucleus. These ions are typically formed by metals losing electrons during chemical reactions.
Ions do not share electrons with other atoms. Ions are formed when atoms gain or lose electrons to achieve a stable electron configuration. Positive ions (cations) lose electrons, while negative ions (anions) gain electrons.
Ions are charged particles that form when atoms gain or lose electrons. Positive ions, called cations, result from atoms losing electrons, while negative ions, called anions, form when atoms gain electrons. Ions play a key role in chemical reactions, conductivity, and various biological processes.
For the most part Argon has 18 electons, but there are ions that have 18 electrons: Phosphurus, Sulfur, Cluorine, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, and Germanium.
Ions. Cations have lost electrons and have a positive charge. Anions have gained electrons and have a negative charge.