Aluminium will lose 3 electrons to form Al3+ ions.
Only three electrons.
In a redox reaction the number of electrons lost by one particle is equal to the number of electrons gained by another particle.
Often there are the same number of electrons as there are protons. Exceptions to this are called ions, which have gained or lost an electron (can't be a proton lost or gained, that would change the element).
The number of electrons lost or gained by an atom in a chemical reaction is its oxidation number. This represents the charge an atom would have if the bonding electrons were completely transferred. It helps to understand how atoms combine and react with each other.
An ion can have a positive charge (cation) if it has lost electrons, or a negative charge (anion) if it has gained electrons. The charge of an ion is determined by the number of electrons it has gained or lost during the process of ionization.
It is called Oxidation number.
Electrons are both gained and lost. Electrons are both gained and lost.
the oxidation number
The oxidation number of an element is a measure of the number of electrons that an atom of that element has gained or lost to achieve a stable electron configuration. It is a value that is assigned to an element in a compound to help track the flow of electrons in chemical reactions. Oxidation numbers can be positive, negative, or zero, depending on whether the element has lost, gained, or shared electrons.
Gaining electrons lead to decrease in oxidation state.
Electrons are the ones gained or lost in a chemical reaction. Electrons are gained in oxidation and lost through the chemical reaction known as reduction.
The charge an element would have if it lost or gained electrons