Magnesium, achemical element with the symbol Mg and atomic number 12, is shiny grey whitesolid appearance aspect with the shortest melting and also boiling points amongst all thealkaline planet metals.

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

You are below toknow valence electron of a magnesium atom, aren’t you? Don’t worry along with magnesiumvalence electrons us will define its valency also. But before that let’s havesome basic ideas around what these two terms are:

Difference BetweenValence Electrons and also Valency

Valence electronsare the total variety of electrons current in the outermost shell of an atom(i.e. In outermost orbital). The valence electrons because that a neutral atom arealways definite, it cannot be differed (more or less) in any kind of condition because that 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 in ~ the timeof bond development to obtain a stable digital configuration i.e. To complete anoctet. The valency of one atom deserve to be variable in different compounds orchemical reactions as result of the various bonding circumstances. Most of the timevalency varies/changes early out to change in oxidation and also reduction states.

Magnesium (Mg)Valence Electrons

There are 4 simplesteps to uncover out the valence electrons for magnesium atom i m sorry are:

Step 1: find theAtomic Number


To uncover out theatomic variety of magnesium, we can use the periodic table. V the help of theperiodic table, us can quickly see the the atomic number of magnesium is 12. Asits atomic number is 12, it has 12 protons, and for neutral magnesium, thenumber of protons is constantly equal come the number of electrons i.e. Has 12electrons in the nucleus.

Step 2: WriteElectron Configuration


Electronconfiguration is the plan of electrons on the orbitals. The magnesiumatom has a complete of 12 electron so, we have to put 12 electron in orbitals.The electrons will be placed in different orbitals according 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 us know, thevalence shell of an atom deserve to be discovered from the highest variety of principlequantum number which are expressed in the term of n, and also in 3s2, thehighest value of n is 3 so the the valence shell of magnesium is3s2.

Step 4: FindValence Electrons

The complete number ofelectrons existing in the valence covering of an atom are called valence electrons,and there space a complete of 2 electrons existing in the valence covering of magnesium(3s2). Thus,magnesium has two valence electrons.

Valency of Magnesium(Mg)

There room manydifferent methods to find out the valency of one atom which reflects the ability ofan atom come bond with various other atoms. Valence defines how easily an atom or afree radical can integrate with various other chemical species. The valency of an atom isdetermined based upon the number of electrons lost, gained, or shared withanother atom at the time of shortcut formation.

An atom is said tobe stable as soon as its outermost shells have eight electrons (except H & He).If the total number of electrons in outermost shells is between one come four,the atom has actually positive valency and if electron are between four come eight, thevalency is calculate by subtracting from eight and also valency will certainly be zero. Atomshaving four outermost electrons possess both positive and an unfavorable valency, andatoms having actually eight outermost electrons, valency will certainly be zero (i.e. Noblegases).

Elements like 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 secure oxidation state that +2 most of the time yet it might differ insome compounds. Carry out not confuse v +2 or something rather (+1, +3, +4, etc.)with a confident or negative sign, that is just an oxidation number that can vary from compound to compound. But its valency is always 2 in any kind of case.

In another sense, amagnesium atom can form a maximum of two covalent bond in a chemical bonding (Forexample: MgO, MgCl2, MgSO4, etc.), and also that what valency is, the best abilityto form bonds with atoms at the moment of chemical bonding.

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We can likewise findthe valency of magnesium v the aid of the periodic table. Together magnesiumbelongs to team 2A (or IIA) together with beryllium (Be), calcium (Ca), strontium(Sr), barium (Ba), and also radium (Ra). This group elements are likewise called alkalineearth metals. All these elements have valency two.