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Electrons; valence electrons are on the outermost level
When "x" valence electrons are lost the charge is +x When "x" valence electrons are gained the charge is -x for example, if chlorine gained one electron, the charge would be Cl 1- or, if magnesium lost two electrons, the charge would be Mg 2+
An atom becomes more positive when it loses an electron because electrons carry a negative charge. When an atom gains an electron, the atom becomes more negative.
negative
Magnesium as an atom has two valance electrons. To complete it's octet, it must lose two electrons. Losing two electrons will make Mg have 12 protons and 10 electrons therefore having a +2 charge.
The electron configuration of magnesium is 1s2 2s2 2p6 3s2. Mg+ has one less electron (electrons have negative charge, so a positive charge is a lack of electrons) so you remove one from the outermost orbital: 1s2 2s2 2p6 3s1, or simply [Ne] 3s1.
An atom with 12 electrons, such as a neutral magnesium atom, will contain 2 electrons in its first energy level, 8 electrons in its second energy level, and 2 electrons in its third energy level. The electron configuration table for magnesium would look like this: 1s2 2s2 2p6 3s2 For the atom of magnesium to become "stable," it would have to lose those two valence electrons in its outermost shell by forming an ionic bond with another atom, thus becoming a magnesium ion with a -2 charge, written as Mg-2.
In MgCl², Magnesium has 12 electrons, and its electronic configuration can be written as 2,8,2. Thus Magnesium has two electrons in its outermost orbit or it can be said that Magnesium has 2 valence electrons.In MgCl², each Chlorine atom has 17 electrons and its electronic configuration can be written as 2,8,7. Thus each Chlorine atom has seven electrons in its outermost orbit or it can be said that each Chlorine has 7 valence electrons.Magnesium wants to give away its two valence electrons to complete its octet by having 8 electrons in its outermost orbit attaining the electronic configuration of its nearest inert gas Neon. And each chlorine atom wants to complete its octet by adding one more electron in its outermost orbit so that it can have 8 electrons in its outermost orbit attaining the electronic configuration of its nearest inert gas Argon. So, we see that Magnesium wants to lose two electrons and each Chlorine atom wants to add one more electron in their outermost orbit Thus, Magnesium transfers its two electrons to two Chlorine atoms (one electron to each Chlorine atom) and thus Magnesium obtains +2 charge and each chlorine atom acquires −1 charge and ionic bonds are formed between the atoms of the molecule.An eletrovalent compound or ionic compound is formed when one atom in the compound transfers its electrons from itself to its neighboring atom. In MgCl², Magnesium transfers its two electrons to its neighboring chlorine atoms, and forms two ionic bonds between the atoms. Thus, MgCl² is an electrovalent compound or an ionic compound.
Electrons; valence electrons are on the outermost level
Lithium is in group 1 of the Periodic How_many_electrons_must_the_lithium_atom_give_up_to_become_stable, so it must lose one electron for it to attain a full outermost energy level and become stable.The charge will then be positive (+).
When "x" valence electrons are lost the charge is +x When "x" valence electrons are gained the charge is -x for example, if chlorine gained one electron, the charge would be Cl 1- or, if magnesium lost two electrons, the charge would be Mg 2+
The charge on a magnesium ion with 10 electrons (Mg2+) is +2.
For an aluminium atom to gain a 3+ charge, it must lose its 3 outermost electrons; its valence electron. It then becomes an aluminium cation.
Bromine has seven electrons in its outermost energy level. It can get the stable electron configuration by getting one electron from another atom which makes the -1 charge.
An atom becomes more positive when it loses an electron because electrons carry a negative charge. When an atom gains an electron, the atom becomes more negative.
Magnesium has 12 protons, so if there are only 10 electrons, then it will have a +2 charge.
Looking at the periodic table we see that magnesium has an atomic number of 12, thus has 12 protons. To keep it neutral, it must also have 2 electrons. Filling in the first 12 electron orbitals gives us an electron configuration of 1s2 2s2 2p6 3s2. Thus, magnesium also has 2 valence electrons and so is your answer.