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

You are watching: How many valence electrons are in magnesium

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

You are right here toknow valence electron 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 an easy ideas about what these two terms are:

Difference BetweenValence Electrons and Valency

Valence electronsare the total number of electrons present in the outermost shell 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 condition because that aparticular atom and also may or may not be same to the valency.


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

Magnesium (Mg)Valence Electrons

There are 4 simplesteps to discover out the valence electrons because that magnesium atom i m sorry are:

Step 1: uncover theAtomic Number


To discover out theatomic number of magnesium, we can use the periodic table. V the help of theperiodic table, we can quickly see the the atomic variety of magnesium is 12. Asits atom number is 12, it has 12 protons, and for neutral magnesium, thenumber of proton is always equal to the number of electrons i.e. Has 12electrons in that nucleus.

Step 2: WriteElectron Configuration


Electronconfiguration is the arrangement of electrons on the orbitals. The magnesiumatom has a full of 12 electrons 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 us know, thevalence covering of one atom have the right to be uncovered from the highest number of principlequantum numbers which room expressed in the term of n, and in 3s2, thehighest worth of n is 3 so that the valence shell of magnesium is3s2.

Step 4: FindValence Electrons

The complete number ofelectrons current in the valence shell of an atom are referred to as valence electrons,and there room a complete of two electrons existing in the valence covering of magnesium(3s2). Thus,magnesium has actually two valence electrons.

Valency of Magnesium(Mg)

There space manydifferent ways to discover out the valency of one atom which mirrors the capability ofan atom come bond with other atoms. Valence explains how quickly an atom or afree radical can integrate with various other chemical species. The valency of an atom isdetermined based on the variety of electrons lost, gained, or common withanother atom at the moment of shortcut formation.

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

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

Note: Usually, magnesiumhas a steady oxidation state that +2 most of the time yet it may differ insome compounds. Do not confuse with +2 or something rather (+1, +3, +4, etc.)with a optimistic or negative sign, the is just an oxidation number that have the right to vary from link to compound. Yet its valency is always 2 in any kind of case.

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

See more: Those Aren'T You Will Be Too Much For Some People Those Aren'T Your

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