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Atomic Properties Electronic Configuration
Element Symbol Atomic No. Electronic Configuration Abundance in Earth's crust (in ppm) Helium He 2 1s 2 5.2 x 10 - 4 Neon Ne 10 [He] 2s 2 2p 6 1.8 x 10 - 3 Argon Ar 18 [Ne] 3s 2 3p 6 9.3 x 10 - 1 Krypton Kr ..
Electronic configurations
Group 2 elements are called alkaline Earth metals. These elements have two electrons in the valence shell of their atoms, preceded by the noble gas configuration. Their general configuration is written as [Noble gas] ns 2 where 'n' represents the ..
Cause of Periodicity of Elements
Cause of Periodicity of Elements - The modern periodic table is based on the electronic configuration of the elements. The properties of an element are determined largely by the electrons in its outermost or v..
Cause of Periodicity of Elements
The modern periodic table is based on the electronic configuration of the elements. The properties of an element are determined largely by the electrons in its outermost or valence shell. Valence electrons interact wit..
Periodic Classification of Elements Summary
>Group number is number of electrons in the valence shell. Elements having the same valence number, are grouped together. The number of shells present in the atom gives period number. Metallic character decreases along a period and increases down a group. Val..
Salient features of elements classified in periodic table
. According to Mendeleev's periodic law, the physical and chemical properties of elements are periodic functions of their atomic mass Mendeleev was able to predict the existence of undiscovered elements like Ga, Sc and Ge Mendeleev corrected the atomic masses..
Position of Elements in the Modern Periodic Table
The number of elements in these periods is based on the way electrons are filled into various shell..
Electronic configuration of the halogens
Atomic Number Name Electronic Configuration 9 Fluorine 2 7 17 Chlorine 2 8 7 35 Bromine 2 8 18 7 53 Iodine 2 8 18 18 7 85 Astatine 2 8 18 32 18 7 Fluorine is the most reactive of..
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