Magnesium, achemical facet with the price Mg and also atomic number 12, is glowing grey whitesolid appearance aspect with the shortest melting and boiling points among all thealkaline earth metals.

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Magnesium has a greatbiological role. The vital interaction in between phosphate and also magnesium ionsmakes magnesium a really essential aspect to the nucleic acid of every cells. Also, it isused as nutrition in diet, metabolism, detection in serum and 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 define its valency also. But prior to that let’s havesome straightforward ideas around what these two terms are:

Difference BetweenValence Electrons and also Valency

Valence electronsare the total number of electrons existing in the outermost shell 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 equal to its valency.


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Valency is definedas the total number of electrons one atom have the right to lose, gain, or share in ~ the timeof bond development to get a stable digital configuration i.e. To finish anoctet. The valency of an atom have the right to be variable in various compounds orchemical reactions as result of the various bonding circumstances. Most of the timevalency varies/changes due to readjust in oxidation and also reduction states.

Magnesium (Mg)Valence Electrons

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

Step 1: find theAtomic Number


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To find out theatomic number of magnesium, we can use the routine table. Through the help of theperiodic table, us can quickly see that the atomic number of magnesium is 12. Asits atomic number is 12, it has 12 protons, and also for neutral magnesium, thenumber of protons is always equal come the number of electrons i.e. Has actually 12electrons in that nucleus.

Step 2: WriteElectron Configuration


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Electronconfiguration is the setup of electron on the orbitals. The magnesiumatom has actually a complete of 12 electron so, we have to put 12 electrons in orbitals.The electrons will certainly be placed in different 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 covering of an atom deserve to be discovered from the highest variety of principlequantum numbers which space expressed in the hatchet of n, and in 3s2, thehighest value of n is 3 so the the valence covering of magnesium is3s2.

Step 4: FindValence Electrons

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

Valency the Magnesium(Mg)

There room manydifferent means to find out the valency of an atom which shows the capacity ofan atom come bond with other atoms. Valence describes how easily an atom or afree radical can integrate 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 link formation.

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

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

Note: Usually, magnesiumhas a stable oxidation state of +2 many of the time yet it might differ insome compounds. Execute 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. However its valency is always 2 in any type of case.

In an additional sense, amagnesium atom can kind a best of 2 covalent bonds in a chemical bonding (Forexample: MgO, MgCl2, MgSO4, etc.), and also that what valency is, the best abilityto form bonds v atoms at the time of chemistry bonding.

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We can also findthe valency that magnesium with 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). These group facets are additionally called alkalineearth metals. Every these aspects have valency two.