short notes of modern periodic table: long form of the periodic table
Answers
Explanation:
The long form of periodic table is based upon Modern periodic law. Long form of periodic table is the contribution of Range, Werner, Bohr and Bury. This table is also referred to as Bohr's table since it follows Bohr's scheme of the arrangement of elements into four types based on electronic configuration of elements.
Modern periodic table Laws :
In 1913 , Moseley showed that when an electron moving with a high speed strikes a metal surface , then square root of frequency of X - ray produced is directly proportional to nuclear charge of atom of the metal . A plot of against atomic number (Z) gave a straight line and not the plot of vs atomic weight .
where
v
=a(Z−b)
v = frequency of X - ray
Z = Nuclear charge or atomic number
a ,b = Constant
Thus , he considered atomic number as fundamental property of elements and gave modern periodic law by modifying Mendleev's periodic law. According to this law '' The means that if chemical properties of elements are periodic function of their atomic numbers '' . This means that if elements are arranged in order of this increasing atomic number , elements of similar properties resources at regular interval or periodic .
Answer:
modern perodic table.
Explanation:
The Modern periodic law states that The chemical and physical properties of elements are a periodic function of their atomic numbers. The modern periodic table is based on the modern periodic law. Main features: Groups - There are 18 vertical columns in the periodic table.
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