The inert gas in Period 2 is the element Neon(Ne). Its electron configuration is 2-8.
Neon, it is in Period 2, and Group 18.
Groups are the columns and Periods are the rows in the Periodic Table.
1s2
The element calcium, or Ca, is located in group 2, period 4 of the periodic table. Therefore, its electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2. This can also be written as [Ar] 4s2, because the beginning of that electron configuration is the same as argon's. The 42 you mentioned in your question is referring to a specific isotope of calcium and has nothing to with the electron configuration.
Group 1- as the configuration is ns1. The Kr in the question indicates the Krypton core. The 5s1 is the clue - the period number is the same as the principal quantum number (in this case 5) so the element is in group 1 and period 5 - so it is rubidium.
nitrogen will get noble gas configuration by adding three more electrons.
1s2 2s2 2p6 3s2 3p13s23p12nd answer :outer electron configuration is the same as valence electron , you can easily find it in the period table : using the number of the group :Group 1 : one, Group 2 :two , Group 3-12 cannot be found instead d electron count is used , group 13 : three , Group 14 : four ans so on until Gruop 18 : Eight
The alkaline earth elements electron structure end in s2
It is in group 17.
Electron Configuration
Radon!
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S [Ne] 3s2 3p4
The electronic configuration of sodium is [Ne]3s1. Sodium has one valence electron. And it belongs to group 1. The valence electron is in 3s orbitals and it tells that sodium is a s-block element and is in period 3.
Boron exists in period 2, group 13 (IIIA) of the periodic table, with valence of 3 electrons in the outer shell. The electron configuration of boron is 1s22s22p1
the element belongs to 4th period, 9th group, it is a d block element. the element is cobalt
Chlorine is the group 17, period 3 chemical element. Therefore, its electron configuration is 1s2 2s2 2p6 3s2 3p5. Another way to write this is [Ne] 3s2 3p5 since the beginning of the electron configuration is the same as neon's.
The electron configuration of sodium is: [Ne]3s1.
Technicium (Tc) can be found in period 5 group VII of the periodic table. It is a transition metal and so is a d-block element. Thus the electron configuration is [Kr]4d5 5s2
Potassium is the group 1, period 4 element on the periodic table. That means that its electron configuration is 1s2 2s2 2p6 3s2 3p6 4s1. This can be shortened to [Ar] 4s1 because argon's electron configuration is 1s2 2s2 2p6 3s2 3p6.