Magnesium, achemical facet with the prize Mg and also atomic number 12, is shining grey whitesolid appearance facet with the shortest melting and also boiling points amongst all thealkaline planet metals.

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Magnesium has a greatbiological role. The necessary interaction in between phosphate and magnesium ionsmakes magnesium a an extremely essential element to the nucleic mountain of all cells. Also, the isused as nutrition in diet, metabolism, detection in serum and plasma, therapy, etc.

You are here toknow valence electrons of a magnesium atom, aren’t you? Don’t worry along with magnesiumvalence electrons we will explain its valency also. But before that let’s havesome straightforward ideas about what these two terms are:

Difference BetweenValence Electrons and Valency

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


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

Magnesium (Mg)Valence Electrons

There are four simplesteps to find out the valence electrons for magnesium atom which are:

Step 1: discover theAtomic Number


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To find out theatomic number of magnesium, we deserve to use the regular table. V the aid of theperiodic table, us can easily see that the atomic number of magnesium is 12. Asits atom number is 12, it has 12 protons, and also for neutral magnesium, thenumber of proton is always equal to the variety of electrons i.e. Has 12electrons in that nucleus.

Step 2: WriteElectron Configuration


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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 certainly be put 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 us know, thevalence covering of an atom have the right to be uncovered from the highest variety of principlequantum number which room expressed in the hatchet of n, and 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 shell of one atom are dubbed valence electrons,and there room a complete of two electrons current in the valence shell of magnesium(3s2). Thus,magnesium has two valence electrons.

Valency of Magnesium(Mg)

There room manydifferent means to find out the valency of one atom which shows the capacity ofan atom come bond with various other atoms. Valence defines how easily an atom or afree radical can incorporate with other chemical species. The valency of an atom isdetermined based on the variety of electrons lost, gained, or mutual withanother atom at the moment of shortcut formation.

An atom is stated tobe stable as soon as 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 to eight, thevalency is calculated by individually from eight and valency will certainly be zero. Atomshaving four outermost electrons own both hopeful and an unfavorable valency, andatoms having eight outermost electrons, valency will certainly be zero (i.e. Noblegases).

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

Note: Usually, magnesiumhas a secure oxidation state the +2 most of the time however it may differ insome compounds. Do not confuse v +2 or something else (+1, +3, +4, etc.)with a positive or an unfavorable sign, the is simply an oxidation number that have the right to vary from compound to compound. Yet its valency is always 2 in any type of case.

In an additional sense, amagnesium atom can kind a preferably of two covalent bonds in a chemical bonding (Forexample: MgO, MgCl2, MgSO4, etc.), and also that what valency is, the best abilityto kind bonds with atoms at the time of chemical bonding.

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