Explain the trends in Modern periodic table with respect to valency, atomic size and Metallic character.
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Answers
Answer:
TREND OF VALENCY - DEFINITION
In a period, the number of valence electrons increases as we move from left to right side. However, in a group this periodic trend is constant, that is the number of valence electrons remains the same.
TREND OF METALLIC AND NON-METALLIC PROPERTIES IN MODERN PERIODIC TABLE - EXAMPLE
In modern periodic table metallic character increases down the group and decreases from left to right across the period.
TREND OF ATOMIC SIZE IN PERIODIC TABLE - EXAMPLE
The atomic radius of an element is a measure of the size of its atoms. It represents the mean distance from the nucleus to the outermost boundary of the surrounding cloud of electrons. Atomic radii vary in a predictable manner across the periodic table.
Explanation: