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Bonding in Co-ordination Compounds
The first theory was called the Werner's theory of co-ordination compounds. 1) Metals possess two types of valencies: a) Primary valency or ionizable valency. It is also referred to oxidation state. b) Secondary valency which a metal atom or cation exercises ..
Representative Periodic Table for 8 Groups upto Calcium (Atomic Number -20)
Representative elements are those elements whose inner shells are complete and whose outer shell (valency shell) has 1 to 7 electrons. They are also called normal elemen..
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 with other atoms and take part in all chemical reactions, while..
Solution:
Na - 11; 2, 8, 1Number of the valence shell - 3Therefore, sodium is placed in period 3 of the periodic tab..
Solution
Valence electrons = 3; core electrons = 10 Valence electrons = 2; core electrons = 10 Valence electrons = 7; core electrons = 10 Valence electrons = 2; core electrons = 18 ..
Valence electrons = 3; core electrons = 10 Valence electrons = 2; core electrons = 10 Valence electrons = 7; core electrons = 10 Valence electrons = 2; core electrons = 18 ..Solution:
0 - 8 : 2, 6Valency = 8 - Number of valence electrons= 8 - 6= 2 If the outermost shell of an atom is completely filled, its valency = 0. The outermost shells of the noble gases helium, neon, argon, krypton etc. are completely filled. Hence their valency is ze..
0 - 8 : 2, 6Valency = 8 - Number of valence electrons= 8 - 6= 2 If the outermost shell of an atom is completely filled, its valency = 0. The outermost shells of the noble gases helium, neon, argon, krypton etc. are completely filled. Hence their valency is ze..Need for Bonding
Chemical bonding is like a glue that binds atoms together. And what goes into making that glue? Only electrons. Not all electrons make up the glue, it is only the valence electrons. Valence electrons are the outermost electrons [electrons in the last shell..
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 valence shel..
Inert pair effect
It is the reluctance of s-electrons of the valence shell to participate in bonding. This effect becomes more pronounced towards the bottom of each group of the p-block element..
Example:
K L MNa - 11 - 2 8 1Valence shell - MValence electrons - 1Core electrons - 2 + 8 =..
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