While writing elecronic configuration you need to follow three rules: Afbau\'s p

Question

While writing elecronic configuration you need to follow three rules:

Afbau's principle: first electrons will go in the lower energy state,then only higher energy states are filled and he gave the series as :

1s2 2s2 2p63s2 3p64s2 3d104p6 ...

pauli's exclusion principle : no two electrons can have same electronic configuration{ usually used when complete address of an electron is to be shown} not needed here

Hund's rule: evergy electron will occupy before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin{ usually used when complete address of an electron is to be shown} not needed here

1.

For He , atomic no. 2

electronic configuration 1s2

For Lithium,

1s22s1

in terms of noble gas configuration as its core or inner shell

[He]2s1

2.

For Ni , atomic no. 28

electronic configuration 1s2 2s2 2p63s2 3p64s2 3d8

For Cu,

1s2 2s2 2p63s2 3p64s1 3d10

in terms of noble gas configuration as its core or inner shell

[Ar]4s1 3d10

3.

For N , atomic no. 7

electronic configuration 1s22s22p5

For Be atomic no. 4,

1s22s2

in terms of noble gas configuration as its core or inner shell

[He]2s2

Explanation / Answer

Use the References to access impertant values if needed for this question. 1A 3A 4A 5A 6A 7A He C N O F Ne N4 542 Write the complete electron configuration for the helium atom Using NOBLE GAS notation write the electron configuration for the lithium atom. Submit Answer Retry Entire Group 8more group attempts remaining Next 0 FS 5

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