The usual coordination number for beryllium (Be²⁺) is typically 4, as it often forms tetrahedral complexes due to its small size and high charge-to-radius ratio. In contrast, magnesium (Mg²⁺) generally has a coordination number of 6, commonly forming octahedral complexes. These coordination preferences are influenced by the ions' sizes and the nature of their ligands.
Mg2+: [1s22s22p6]
Magnesium, ion (Mg2+)
The correct name of the ion Mg2+ is magnesium ion.
The cation in magnesium chloride is Mg2+ and the anion is Cl-.
The electron configuration for a magnesium cation Mg2 plus is 1s2.2s2.2p6.
The list from smallest to largest ionic radius would be: Be2+, Mg2+, Ba2+, Ra2+. Beryllium and magnesium ions have smaller ionic radii due to their higher charge and stronger attractive forces compared to barium and radium ions.
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.
Mg2+: [1s22s22p6]
The cation for MgCl2 is Mg2+.
Magnesium, ion (Mg2+)
There are 1.20 equivalents in 0.60 mole of Mg2+, since Mg2+ has a charge of 2+.
The correct name of the ion Mg2+ is magnesium ion.
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
Mg2+
Magnesium forms a simple ion with a 2+ charge, typically written as Mg2+.
Oxygen
An Mg2+ ion is a magnesium ion that has a charge of +2, meaning it has lost 2 electrons. The number of neutrons in an Mg2+ ion is the same as in a regular magnesium atom, which is 12 neutrons.