electronic configuration
Post on 23-Jun-2015
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ELECTRONIC CONFIGURATION OF
MAIN GROUP ELEMENTS
( GROUP A )
ELECTRONIC CONFIGURATION
n = 1 (K)n = 2 (L)
n = 3 (M)n = 4 (N)
28
1832
Max. electron
Shell
Max electron in a shell
2 n2
With electronic configuration elements are represented numerically by the number of electrons in their shells and number of shells.
Determination of Electrons in the shell atoms
Kulit K2, jika elektron yang tersedia ≥ 2
1, hanya untuk H
Kulit L8, jika elektron yang tersedia ≥ 8
Elektron sisa, jika elektron yang tersedia< 8
Kulit M
18, jika elektron yang tersedia> 18
8, jika: 8 ≤ elektron< 18 yang tersedia
Elektron sisa, jika elektron yang tersedia< 8
Kulit N
32, jika elektron yang tersedia> 32
Elektron sisa, jika elektron yang tersedia< 8
18, jika: 18 ≤ elektron< 32 yang tersedia
8, jika: 8 ≤ elektron< 18 yang tersedia
Determination of Electrons
in the shell atomsAtomic
Number ElementsTotal electrons in Shell
K L M N O
1 Hidrogen (H) 1
2 Helium (He) 2
5 Boron (B) 2 3
8 Oxygen (O) 2 6
12 Magnesium (Mg) 2 8 2
16 Sulphur (S) 2 8 6
20 Calsium (Ca) 2 8 8 2
54 Xenon (Xe) 2 8 18 18 8
Valence electron
Valence ElectronThe electron at outermost shell
The valence electron determines the chemical characteristic of an atom
The elements that have the same valence electron, have the same chemical characteristic
ELECTRONIC CONFIGURATION
Write the electronic configuration for the following elements;
Cl
Si
Na23
11
35
17
28
14Br
35
79
b)a)
c) d)
2,8,12,8,7
2,8,4 2,8,18,7
Correlation of Electronic
Configuration with Period and GroupThe electron configuration of atom can be used to determine
an atom position in periodic table.
Group Number = valence electronPeriod Number = number of shell filled with electron
Example :Where is position the following elements
in the periodic table??
Sr38 2 8 18 8 2
Group : II A
Period : 5
Ge
32 2 8 18 4Group : IV A
Period : 4
GOL.IA : ALKALI (Except H)
GOL.IIA : ALKALINE EARTH
GOL.IIIA : BORON-ALUMINIUM
GOL.IVA : CARBON-SILICON
GOL.VA : NITROGEN-PHOSPOR
GOL.VIA : OXYGEN-SULPHUR
GOL.VIIA : HALOGEN
GOL.VIIIA : NOBLE GAS
GOL. IB-VIIIB : TRANSITION
Group in the Periodic Table
Elements in Group
Alkali (IA) : Li Na Kau Rebut Cintasuci Feri
Alkaline Earth (IIA) : Besok Minggu Cari Sri Bawa Raun
Boron - Aluminium (IIIA) : Bapak Ali Gandi India Tulen
Carbon (IVA) : Cewek Si Genit Senang Playboy
Nitrogen (VA) : Nara Pidana As Serba Bisa
Oxygen (VIA) : Orang Sinting Senang Teriak Polisi
Halogen (VIIA) : Film Charles Bronson Idaman Atun
Noble Gas (VIIIA) : Heboh Negara Arab Karna Xerangan Rumania
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