Magnesium, achemical aspect with the symbol Mg and atomic number 12, is shiny grey whitesolid appearance facet with the lowest melting and boiling points among all thealkaline earth metals.

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Magnesium has actually a greatbiological role. The vital interaction in between phosphate and also magnesium ionsmakes magnesium a very essential element to the nucleic mountain of all cells. Also, that isused together nutrition in diet, metabolism, detection in serum and plasma, therapy, etc.

You are right here toknow valence electrons of a magnesium atom, aren’t you? Don’t worry in addition to magnesiumvalence electrons we will describe its valency also. But prior to that let’s havesome straightforward ideas around what these 2 terms are:

Difference BetweenValence Electrons and Valency

Valence electronsare the total variety of electrons current in the outermost covering of an atom(i.e. In outermost orbital). The valence electrons for a neutral atom arealways definite, it cannot be varied (more or less) in any kind of condition for aparticular atom and also may or might not be same to that is valency.


Valency is definedas the total variety of electrons one atom deserve to lose, gain, or share at the timeof bond development to get a stable electronic configuration i.e. To finish anoctet. The valency of an atom deserve to be variable in various compounds orchemical reactions as result of the various bonding circumstances. Most of the timevalency varies/changes early to change in oxidation and reduction states.

Magnesium (Mg)Valence Electrons

There are 4 simplesteps to uncover out the valence electrons because that magnesium atom i beg your pardon are:

Step 1: discover theAtomic Number


To discover out theatomic variety of magnesium, we have the right to use the routine table. Through the assist of theperiodic table, us can easily see that the atomic number of magnesium is 12. Asits atomic number is 12, it has actually 12 protons, and for neutral magnesium, thenumber of proton is constantly equal come the number of electrons i.e. Has 12electrons in that is nucleus.

Step 2: WriteElectron Configuration


Electronconfiguration is the setup of electrons on the orbitals. The magnesiumatom has actually a full of 12 electron so, we have to put 12 electron in orbitals.The electrons will be inserted in various orbitals follow to the energylevel: <1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f>.Now,

Magnesium electronconfiguration Mg (12) = 3s2(completeconfiguration).

=1s22s22p63s2(condensed configuration).

Step 3: DetermineValence Shell

As we know, thevalence shell of an atom deserve to be uncovered from the highest variety of principlequantum numbers which space expressed in the hatchet of n, and in 3s2, thehighest worth of n is 3 so the the valence shell of magnesium is3s2.

Step 4: FindValence Electrons

The complete number ofelectrons existing in the valence shell of one atom are called valence electrons,and there are a full of two electrons current in the valence covering of magnesium(3s2). Thus,magnesium has actually two valence electrons.

Valency that Magnesium(Mg)

There are manydifferent means to find out the valency of an atom which reflects the capability ofan atom to bond with various other atoms. Valence defines how quickly an atom or afree radical can integrate with other chemical species. The valency of an atom isdetermined based upon the number of electrons lost, gained, or shared withanother atom at the moment of shortcut formation.

An atom is stated tobe stable when its outermost shells have eight electron (except H & He).If the total variety of electrons in outermost shells is in between one come four,the atom has positive valency and if electrons are in between four come eight, thevalency is calculate by individually from eight and valency will be zero. Atomshaving four outermost electrons possess both confident and negative valency, andatoms having actually eight outermost electrons, valency will be zero (i.e. Noblegases).

Elements choose magnesiumcan reach the steady state (nearest inert gas configuration: Ne) by shedding twoelectrons.So the the valency the magnesium is 2.

Note: Usually, magnesiumhas a stable oxidation state of +2 most of the time however it may differ insome compounds. Carry out not confuse through +2 or something else (+1, +3, +4, etc.)with a optimistic or negative sign, it is simply an oxidation number that can vary from compound to compound. But its valency is always 2 in any type of case.

In an additional sense, amagnesium atom can form a maximum of two covalent bonds in a chemical bonding (Forexample: MgO, MgCl2, MgSO4, etc.), and that what valency is, the maximum abilityto type bonds v atoms at the moment of chemistry bonding.

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We can likewise findthe valency of magnesium v the assist of the routine table. Together magnesiumbelongs to group 2A (or IIA) in addition to beryllium (Be), calcium (Ca), strontium(Sr), barium (Ba), and radium (Ra). This group facets are additionally called alkalineearth metals. All these facets have valency two.