Phosphorus has five valence electrons and needs to gain three additional electrons to achieve a stable noble gas electron configuration, similar to argon. By gaining three electrons, phosphorus can complete its outer shell with eight electrons, reaching stability. Therefore, phosphorus must gain three electrons.
Hydrogen wants to obtain one electron to achieve a stable electron configuration similar to the noble gas helium.
Calcium loses two electrons to obtain a noble-gas electron configuration.
Chlorine atom has 17 electrons. It is readily accepting an electron from another atom to obtain its stable electron configuration (of argon). A chloride ion has 18 electrons.
You can achieve a stable electron configuration by using two electrons by forming a covalent bond with another atom that also has two valence electrons. In this way, each atom can share its valence electrons to achieve a full outer shell and achieve stability.
Sulfur gains two electrons to attain a noble gas configuration, which is the electron configuration of argon. This allows sulfur to have a stable octet of electrons in its outer shell and achieve a more stable electron configuration.
Phosphorus, like all atoms, tries to achieve a full electron shell. For Phosphorus to achieve its full shell and obtain an electron configuration that is isoelectronic with Argon, it must gain 3 electrons. Therefore, Phosphorus forms a -3 anion.
Hydrogen wants to obtain one electron to achieve a stable electron configuration similar to the noble gas helium.
Calcium loses two electrons to obtain a noble-gas electron configuration.
Ionic compounds obtain a stable electron configuration by transferring electrons from one atom to another to achieve a full outer shell. This transfer of electrons results in the formation of positive and negative ions that are attracted to each other by electrostatic forces, creating a stable compound.
Chlorine atom has 17 electrons. It is readily accepting an electron from another atom to obtain its stable electron configuration (of argon). A chloride ion has 18 electrons.
You can achieve a stable electron configuration by using two electrons by forming a covalent bond with another atom that also has two valence electrons. In this way, each atom can share its valence electrons to achieve a full outer shell and achieve stability.
Sulfur gains two electrons to attain a noble gas configuration, which is the electron configuration of argon. This allows sulfur to have a stable octet of electrons in its outer shell and achieve a more stable electron configuration.
Carbon needs to gain four electrons in order to obtain a noble gas electron configuration, similar to that of neon. This will result in a full valence shell with eight electrons, fulfilling the octet rule.
The outermost shell in an atom is also known as the valence shell. When an atom is able to donate or obtain electrons to obtain a noble gas electron configuration, it is said to be stable. Generally, metals are electron donors and non metals are electron acceptors.
metals lose electrons to form ions so as to obtain noble gas configuration. for e.g. sodium(Na) has 11 electrons i.e. 1 electron in its valent (last) shell, to attain noble gas configuration sodium loses 1 electron which may be gained by a non-metal to stabilize itself.
A metal typically reacts to obtain an octet of valence electrons by losing its valence electrons. Metals have few valence electrons (usually 1 to 3) and a low electronegativity, making it energetically favorable for them to lose these electrons and achieve a stable electron configuration. By doing so, they become positively charged ions (cations) and can attain a stable electron arrangement similar to that of noble gases.
Potassium (K) can achieve eight valence electrons by losing one electron to form a stable cation with a +1 charge. In this form, it will have the same electron configuration as the nearest noble gas (argon), which has a full valence shell with eight electrons.