Magnesium, ion (Mg2+)
Mg2+: [1s22s22p6]
The electron configuration for a magnesium cation Mg2 plus is 1s2.2s2.2p6.
Mg2+
Magnesium that has lost 2 electrons.
The Mg2 plus cation has 10 electrons.
Mg2+: [1s22s22p6]
There are 1.20 equivalents in 0.60 mole of Mg2+, since Mg2+ has a charge of 2+.
The electron configuration for a magnesium cation Mg2 plus is 1s2.2s2.2p6.
Mg2+
Cu + Mg2 --------> Cu2 + Mg Cu --------------> Cu2 + 2e Mg2 + 2e --------> Mg Cu --------------> Cu2 + 2e (E = +0.35) Mg2 + 2e --------> Mg (E = -2.36V) +0.35 + (-2.36) = -2.01V --------------------------------------… Mg + Cu2 --------> Mg2 + Cu Mg --------------> Mg2 + 2e Cu2 + 2e --------> Cu Mg --------------> Mg2 + 2e (E = +2.36V) Cu2 + 2e --------> Mg (E = -0.35V) +2.36 + (-0.35) = +2.01V
Magnesium that has lost 2 electrons.
NO3-
The Mg2 plus cation has 10 electrons.
Mg equals Mg2+ plus 2e-
Mg2+ exists in aqueous solution when a magnesium salt has been dissolved. When added to water: MgCl2 (s) => Mg2+ + 2Cl-
An Mg2+ ion has lost two electrons, resulting in a total of 10 electrons. Magnesium normally has 12 electrons but when it forms a 2+ ion, it loses two electrons.
Mg2+ acts as a Lewis acid because it can accept a pair of electrons to form coordination complexes. In this capacity, Mg2+ does not donate electrons; rather, it accepts electron pairs from other molecules or ions.