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Magnesium is in Group 2 of the Periodic Table, so it has two outermost electrons. To have a full complement of e- in its outer shell, it must lose 2, hence, it becomes an Mg2+ ion.

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14y ago
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11y ago

Magnesium has to lose 2 electrons to get the noble gas configuration of the noble gas, neon.

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9y ago

The neutral atom of magnesium has 12 electrons; the magnesium cation (Mg2+) has 1o electrons.

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13y ago

Two:

Mg --> Mg2+ + 2e-

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9y ago

It loses 2 valence electrons.

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11y ago

lose 2

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Q: How many electrons does magnesium need to loss to get a full outer shell?
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Related questions

How many more valence electrons does magnesium need to have a full outer valence shell?

it needs six more electrons to have a full outer valence shell.


Is an atom with six electrons more stable than an atom with one?

No. A atom is stable when it has a full valence shell. The way this works is (2,8,8,8...) For an example magnesium which has 12 electrons. Magnesium loses 2 electrons ( so it has 2, 8 and then has a full outer shell) to gain a full outer charge which results in a charge of 2+.


How many bonds can magnesium chloride form?

Magnesium chloride is an ionic compound. Magnesium has 2 valence electrons, and chlorine has 7. According to the octet rule, each element will bond in such a way that it ends up having 8 electrons in its outer shell--either by adding electrons to its outer shell until it has 8, or by losing all the electrons in its outer shell (that way, the next-largest electron shell--which is already full--becomes the new outer shell). Since magnesium has 2 valence electrons, it will lose two electrons (it's easier to go 2 - 2 = 0 than to go 2 + 6 = 8). Chlorine has 7, so it will gain an electron and have a full (8-electron) outer shell. There must therefore be two chlorines for every magnesium: each chlorine accepts one of the two electrons donated by magnesium. Magnesium forms two ionic bonds: one to each chloride ion.


What is The element that has no unpaired electrons in the outer shell in its ground state is?

There are many elements which have no unpaired electrons in their outer shells. The Noble gasses all have closed shells of valence electrons. The alkali earth metals (Beryllium, Magnesium, Calcium etc) also have no unpaired electrons, although their outer shell is not entirely full.


Argon is a stable gas with a very high ionization energy Which statement explains why?

It has a full outer shell of electrons


How many electrons does Magnesium need to complete last shell?

Magnesium, in the second group, can either gain six electrons or lose two electrons to achieve a full outer shell.


What would be the charge of a beryllium atom that has a full outer shell?

Beryllium has 2 outer shell electrons. Its full electronic configuration is:- 1s2, 2s2


An element is inactive if?

It has a full outer shell of electrons.


Is the outer shell of argon full?

Yes it is . The outer argon is full becoz it has 18 electrons


Is the outer shell of nickel full?

no its outside shell has 10/18 electrons


How many valence electrons will most elements have after forming an ion?

Atoms often form ions by losing or gaining enough electrons to end up with a full outer shell. How many electrons are in a full outer shell for most atoms? Don't know? How about Googling full outer shell?


Why do noble gases not normally form compounds?

Noble gases have a full outer shell, meaning that they have no valence electrons and have 8 electrons in their outer shell. If the outer shell is full they do not need electrons, so they would not want to bond with another element to form a compound.