If magnesium loses two electrons and form Mg2+ ion, it will get the configuration of the nearest noble gas, neon
Magnesium has an atomic number of 12, which means it has 12 electrons. To achieve a noble gas configuration, magnesium would need to lose both of its valence electrons. This can be achieved through chemical reactions, where magnesium can form ionic compounds by transferring its electrons to other elements, such as oxygen or chlorine.
Xenon is a noble gas, so its noble gas configuration would be [Xe] Its configuration using the short-cut method would be [Kr]5s24d105p6
Argon
Calcium has to lose 2 electrons to form noble gas configuration.
The noble gas configuration for nitrogen is [He] 2s2 2p3per the notation protocol.
the noble gas configuration of silver would be [Kr]4d105s1, because the s orbital is the valence shell, whereas the d orbital is a lower energy level. Thus, it would not be [Kr]4d95s2.
Xenon is a noble gas, so its noble gas configuration would be [Xe] Its configuration using the short-cut method would be [Kr]5s24d105p6
Argon
Magnesium (Mg) has atomic number 12, so the electron configuration is1s2 2s2 2p6 3s2. The VALENCE electron configuration would simply be 3s2.
Calcium has to lose 2 electrons to form noble gas configuration.
The noble gas configuration for nitrogen is [He] 2s2 2p3per the notation protocol.
1s2 2s2 2p6 3s2
There are two possible 'noble gas' configurations:2 8 18 32 18 8 for Bi3-, or in shorthand configuration [Xe] 4f14, 5d10, 6s2 6p6and2 8 18 32 18 0 for Bi5+, or in shorthand configuration [Xe] 4f14, 5d10, 6s0 6p0Bismuth (as metaloid atom) in elemental notation: [Xe] 4f14, 5d10, 6s2 6p3
the noble gas configuration of silver would be [Kr]4d105s1, because the s orbital is the valence shell, whereas the d orbital is a lower energy level. Thus, it would not be [Kr]4d95s2.
Sodium has only one valence electron, and when that is donated to some other atom, the remaining ion has a noble gas configuration that is highly stable. Disrupting that by another ionization requires much energy. Magnesium has two valence electrons; therefore the second is almost as easy to donate as the first. The third ionization enthalpy of magnesium would be very high.
Magnesium has two outer shell electrons which are loosely held. This is not a stable configuration. As a result magnesium will lose those two electrons, making the electron shell below that, which has 8 electrons, the new outer shell. An electron shel with 8 electrons is stable.
To attain the noble gas configuration, Ca would have to lose 2 electrons, Mg would have to lose 2 electrons, Ba would have to lose 2 electrons, and Be would have to lose 2 electrons.
To achieve noble gas configuration, Bromine must gain one electron. In doing so, it obtains the electron configuration of Krypton. It's new complete electron configuration would be: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.