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

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Magnesium has a greatbiological role. The crucial interaction between phosphate and also magnesium ionsmakes magnesium a an extremely essential element to the nucleic mountain of all cells. Also, it 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 together with magnesiumvalence electrons us will describe its valency also. But prior to that let’s havesome basic ideas around what these two terms are:

Difference BetweenValence Electrons and also Valency

Valence electronsare the total number of electrons present in the outermost shell of one atom(i.e. In outermost orbital). The valence electrons for a neutral atom arealways definite, it cannot be varied (more or less) in any condition for aparticular atom and may or might not be equal to that is valency.


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Valency is definedas the total number of electrons an atom can lose, gain, or share in ~ the timeof bond development to obtain a stable digital configuration i.e. To complete anoctet. The valency of an atom have the right to be change in various compounds orchemical reactions because of the different bonding circumstances. Many of the timevalency varies/changes early out to change in oxidation and also reduction states.

Magnesium (Mg)Valence Electrons

There are 4 simplesteps to discover out the valence electrons because that magnesium atom which are:

Step 1: uncover theAtomic Number


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To uncover out theatomic number of magnesium, we can use the periodic table. V the assist of theperiodic table, us can easily see that the atomic number of magnesium is 12. Asits atom number is 12, it has actually 12 protons, and also for neutral magnesium, thenumber of protons is constantly equal come the number of electrons i.e. Has 12electrons in its nucleus.

Step 2: WriteElectron Configuration


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Electronconfiguration is the setup of electron on the orbitals. The magnesiumatom has a total of 12 electrons so, we need to put 12 electron in orbitals.The electrons will certainly be put in various 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 one atom deserve to be discovered from the highest variety of principlequantum number which space expressed in the term of n, and also in 3s2, thehighest value of n is 3 so that the valence shell of magnesium is3s2.

Step 4: FindValence Electrons

The full number ofelectrons current in the valence covering of one atom are dubbed valence electrons,and there space a total of 2 electrons existing in the valence covering of magnesium(3s2). Thus,magnesium has actually two valence electrons.

Valency of Magnesium(Mg)

There are manydifferent ways to discover out the valency of one atom which mirrors the capacity ofan atom to bond with other atoms. Valence describes how quickly an atom or afree radical can incorporate with various other chemical species. The valency of an atom isdetermined based on the number of electrons lost, gained, or common withanother atom at the time of bond formation.

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

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

Note: Usually, magnesiumhas a secure oxidation state the +2 many of the time but it might differ insome compounds. Perform not confuse v +2 or something rather (+1, +3, +4, etc.)with a positive or an adverse sign, the is just an oxidation number that have the right to vary from compound to compound. But its valency is constantly 2 in any type of case.

In another sense, amagnesium atom can type a best of 2 covalent binding in a chemical bonding (Forexample: MgO, MgCl2, MgSO4, etc.), and also that what valency is, the preferably abilityto form bonds through atoms at the moment of chemical bonding.

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We can additionally findthe valency that magnesium through the help of the regular table. Together magnesiumbelongs to group 2A (or IIA) along with beryllium (Be), calcium (Ca), strontium(Sr), barium (Ba), and also radium (Ra). These group aspects are additionally called alkalineearth metals. All these aspects have valency two.