Hello friends In the previous post we had read about different parts of the modern periodic table and in today's post we will read about the Bohr's classification of elements . Let's start
BOHR'S CLASSIFICATION
Classified = four
Four parts such as = (A) Inert gas element
(B)Normal element or Representative
(C) transition element
(D) Inner transition elements
(A) Inert gas element
Configuration Formula = ns2np6
Total elements = 6
Name of six elements = Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Radon (Rn) and Xenon (Xe).
(B)Normal element or Representative
Also called = Representative elements
Configuration Formula = ns1–2 np1-5
Final conclusion to above = s - block + p - block
Total group in s block and p block = iA, ⅱA, ⅲA, ⅳA, ⅴA, ⅵA, ⅶA
(C) transition element
Also known as = Hard metal
Configuration Formula = (n-1)d1–10ns1-2
Total group = ⅲB, ⅳB, ⅴB, ⅵB, ⅶB, and ⅷB, iB & ⅱB
Exception of transition element = Cu, Zn, Cd, Hg, Ag & Au
(D) Inner transition elements
Configuration Formula = (n-2)+f1–145d0-16s2
or
(n-2)f1-14(n-1)d0-1ns2.
Two series = Lanthanoids series & Actionoides series
TYPICAL ELEMENTS
The elements of 3rd period are called typical elements because the rest particular groups resembles in there properties of there respect member of typical elements (ex - Na, Mg, Al, Si, P & S)
BRIDGE ELEMENTS
Called = Diagonal reaction
2nd period = Ci, Be, B, C, N, O, F
↘ ↘ ↘ ↘ ↘ ↘
Na, Mg, H, Si, P, S, Cl
Most of the elements of the 2nd period resembles in there properties of there member of 3rd period Diagonal situated is called bridge elements.
2nd period
↗ ↓ → Diagonal reaction
↗ 3rd period
↗
Properties
↓
Related 3rd resembles period
If you have any questions relating to this post then you can ask.
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