Helium has 2 electrons in its last (and only) shell. All other noble gases have 8 electrons in its valence shell.
Chlorine gains 1 electron to achieve the noble gas electron configuration of argon.
Chlorine need one extra negatively charged electron to be a noble gas.
The sodium atom (Na) has 11 electrons. The electron configuration of sodium is 2-8-1. The third noble gas shell is the second energy level or shell, which can hold a maximum of 8 electrons. Therefore, the number of electrons in the third noble gas shell of sodium is 1.
Neon and other noble gases have a full outer electron shell, so they have 8 electrons (except helium, which has 2) due to their stable electron configuration. This full outer shell makes them highly stable and unreactive.
It should actually obtain an electron in order to fill its outer shell.
Potassium has one electron in its outer shell. It will lose this electron to achieve the noble gas electron configuration of argon in its previous full shell.
Xenon has 8 electrons in its outermost electron shell, making it a stable noble gas.
Noble gases have 8 electron shielding layers. This is because noble gases have a full outer electron shell, so they have filled all available energy levels up to the 8th shell, leading to 8 electron shielding layers.
Chlorine gains 1 electron to achieve the noble gas electron configuration of argon.
Potassium needs to lose 1 electron to achieve a full outer shell, as it has 1 electron in its outermost shell. By losing this electron, potassium can achieve the stable electron configuration of the nearest noble gas, argon.
Chlorine need one extra negatively charged electron to be a noble gas.
The sodium atom (Na) has 11 electrons. The electron configuration of sodium is 2-8-1. The third noble gas shell is the second energy level or shell, which can hold a maximum of 8 electrons. Therefore, the number of electrons in the third noble gas shell of sodium is 1.
Neon and other noble gases have a full outer electron shell, so they have 8 electrons (except helium, which has 2) due to their stable electron configuration. This full outer shell makes them highly stable and unreactive.
chlorine would need only one electron to attain an octet structure.
It should actually obtain an electron in order to fill its outer shell.
Krypton has eight outer shell electrons. It is a noble gas with the electron configuration of [Ar] 3d¹⁰ 4s² 4p⁶, indicating that its outermost shell (the fourth shell) is fully occupied with eight electrons. This full valence shell contributes to krypton's chemical inertness.
They have to gain 1 electron. Halogens have 7 electrons in their valence shell and noble gasses have 8.