Phosphorus achieves a noble gas configuration by gaining or sharing electrons to fill its valence shell, typically reaching a total of eight electrons. This often occurs when phosphorus forms compounds, such as phosphides with metals or covalent compounds with nonmetals like oxygen and chlorine. In its most stable form, phosphorus can be found in P₄ molecules, where it shares electrons with other phosphorus atoms, thus achieving a stable electronic arrangement.
When phosphorus achieves a noble gas configuration, it gains three electrons to become the phosphide ion (P³⁻). This allows it to achieve the stable electron configuration of a noble gas, similar to argon.
The pseudo-noble gas configuration for calcium is achieved when it loses two electrons to form a Ca2+ ion. This results in the same electron configuration as argon.
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The noble gas configuration of Mg2+ is [Ne] because the magnesium atom loses two electrons to form the Mg2+ ion. The electron configuration of Ne is 1s2 2s2 2p6, so when Mg loses its two valence electrons, it achieves a stable electron configuration similar to that of the noble gas Ne.
All halogens have 7 valence electrons. They gain one electron and achieve noble gas electronic configuration
P3-
The calcium ion formed when it achieves a noble-gas electron configuration is Ca2+, as it loses two electrons to have the same electron configuration as argon, a noble gas.
[Ne] 3s2 3p3
When phosphorus achieves a noble gas configuration, it gains three electrons to become the phosphide ion (P³⁻). This allows it to achieve the stable electron configuration of a noble gas, similar to argon.
K+
P 3- is the ion with the noble gas configuration.
Potassium loses one electron to form K+ ion that has the noble gas configuration of the element neon.
The pseudo-noble gas configuration for calcium is achieved when it loses two electrons to form a Ca2+ ion. This results in the same electron configuration as argon.
When potassium achieves a noble gas electron configuration, it loses one electron to form the K+ ion. The K+ ion has a stable electron configuration similar to that of argon, with 18 electrons.
Sulfur atoms will gain two electrons in order to achieve a noble gas electron configuration. A sulfide ion has the formula S2-.
P3- or phosphide ion is formed. it has the same number of electrons as the noble gas, argon
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