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Cation: Are the atoms that lose an electron so they become Positive.

Anion: Are the atoms that gain an electron so they become Negative.

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What happens when electrons are gained or lost?

Gain or electron means reduction energy is not gained but given off during this and also when oxidation takes place the same thing thing happens' energy is released when a redox reaction takes place(ie both oxidation & reduction)


What information is given in redox half-reaction?

How many electrons are taken up by an oxidant in the 1st halfreaction (oxidant reaction),and how many electrons are given free by a reductant in the 2st halfreaction (reductant reaction)


What word describes the outermost shell of the electrons?

The VALENCE Shell. In any chemical reaction it is the electrons in the Valence Shell that do the reacting. Any inner shells of electrons do NOT take part in a chemical reaction.


What is cathodic reaction?

Taken from Introduction To Corrosion Science by E. McCafferty Two notable things occur during a cathodic reaction. 1.) A given species undergoes reduction (there is a decrease in its oxidation number) 2.) A gain of electrons at the cathodic site (electrons are consumed by the reaction) An example of a cathodic reaction is: 2H+(aq) + 2e- ==> H2(g) This reaction however is just a half-cell reaction, which means it is usually coupled (happens along with) an anodic reaction.


Which element decreases its oxidation number in the following reaction?

An element that decreases its oxidation number in a chemical reaction is undergoing reduction. In the given reaction, the element that is reduced is the one that gains electrons and decreases its oxidation number.


What is a substance that has lost or gained electrons?

Most atoms have the ability to lose electrons, given the conditions are favorable, e.g. in a chemical reaction, but the ones that loose their electrons easiest are the ones with only a few electrons in their outer shell, such as the alkali metals and alkaline earth metals which only have 1 and two electrons, respectively.


How many total electrons are transferred in the following reaction B2H6(g) 3O2(g) B2O3(s) 3(H20)?

In the given reaction, B2H6 reacts with 3 O2 to form B2O3 and 3 H2O. To balance the reaction, 12 electrons are transferred: 12 electrons are lost by the boron atoms in B2H6, and 12 electrons are gained by the oxygen atoms in O2 to form water molecules.


Why is it a sign of a chemical reaction if gas is given off?

It is sign of chemical reaction because smell and heat is produced.


What te of reaction is fe304 4H2 4H20 3fe?

The given chemical equation represents a redox reaction, specifically a reduction-oxidation reaction. It involves the transfer of electrons between iron (Fe) and hydrogen (H) to form different compounds.


What piece of information is given in a half-reaction?

The number of electrons transferred in the reaction . . APEX c;


What is the scientific word for a gas given off during a chemical reaction?

A reaction that emmits heat is called an exothermic reaction .


What is the name given to the reaction where oxygen is removed from a chemical?

This reaction can be called "deoxidation" or "reduction".