[He] 2s1
I am assuming that the question is for Co2+ ion. and the answer is [Ar] 3d5 4s2
The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point forward. The notation is shorter to write and makes it easier to identify elements. The noble gas notation starts for elements after helium. For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.
Br - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5The noble gas notation form isBr- [Ar] 4s2 3d10 4p5Br- ion has 36 electrons and has the same electronic configuration as the noble gas krypton.Its noble gas notation is [Ar] 3d10 4s2 4p6
calcium is normally [Ar] 4s2 if it is a 2+ ion, then it has lost 2 electrons so the configuration is just [Ar]
[He] 2s1
S2- ion: [Ne]3s23p6
.. [Li]+ [:I:]- (put the last 2 pairs above and below the "I" this wont let me) ..
I am assuming that the question is for Co2+ ion. and the answer is [Ar] 3d5 4s2
When lithium loses an atom, it becomes a positive ion. This is because lithium is a metal and tends to lose its outer electron to achieve a stable electron configuration like the nearest noble gas, helium. Therefore, it forms a lithium ion with a +1 charge.
The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point forward. The notation is shorter to write and makes it easier to identify elements. The noble gas notation starts for elements after helium. For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.
Br - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5The noble gas notation form isBr- [Ar] 4s2 3d10 4p5Br- ion has 36 electrons and has the same electronic configuration as the noble gas krypton.Its noble gas notation is [Ar] 3d10 4s2 4p6
calcium is normally [Ar] 4s2 if it is a 2+ ion, then it has lost 2 electrons so the configuration is just [Ar]
When phosphorus achieves a noble gas configuration, it gains three electrons to become the phosphide ion (PΒ³β»). This allows it to achieve the stable electron configuration of a noble gas, similar to argon.
P 3- is the ion with the noble gas configuration.
The charge of a sulfide ion that is isoelectric with its nearest noble gas (argon) is -2. This means that the sulfide ion has gained two electrons in order to have the same electron configuration as the noble gas.
The noble gas notation for the copper(II) ion (Cu2+) is [Ar]3d9. This notation represents the electronic configuration of copper when all inner shell electrons up to argon are included before the outer d orbital configuration of 3d9.