Question

mention the trends of period table in chemical properties

Answer 1

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the trends of period table in chemical properties
electronegativity,ionization energy, electron affinity, atomic radius, metallic character, ionic radius and reactivity. Periodic trends arise from the arrangement of elements in the periodic table and allow chemists to quickly and reliably predict an element's properties.


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Answer 2

the following are the periodic trends in chemical properties
1) metallic and non metallic character :
metallic character of elements decrease accros the period and nonmetallic character increase across the period
metallic character increase down the group and nonmetallic character decrease down the group

2) valency or oxidation states :
valency of representative elements is equal to either the number of electrons in the valence shell or equal to 8 minus the number of valence electrons

accros period:
valence with respect to hydrogen or chloride increase from 1 to 4 and then decrease from4 to 0
on other hand valence with respect to oxygen increase from 0to 7

down the group:
elements in the same group show the same valency

3) chemical reactivity :
there is high chemical reactivity of elements at the two extremes of the periodic table and low reactivity in the centre of the periodic table
reducing properties decrease from left to right whereas oxidation properties increase from lest to right





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