Question

what things increases or decreases when we see periodic table from l-r, t-b,.
All things must be included
Tell me class xth

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Answer 1

.. features of groups
1. the element present in a group have the same number of valence or similar electron
2. the number of cells increase as we go DOWN to group.

features of periods
1. the number of valence shell electrons increased by 1 unit as the atomic number increases by one unit on moving from left to right in a period
2. therefore the atoms of different elements with same number of shares are placed in the same period

.Valency
in a group outer electronic configuration is same for all the elements

the valency increased from 1 to 4 till group 14 and then decreases 20 from group is to 18

.Atomic size

the atomic size increases DOWN the group.

the atomic radius decreases on moving from left to right along the period

.metalic and non metalic properties

the reactivity of metals increases on moving down a group while that of non metals decreases.
nature of oxides.
along A period the basic character of the oxide of the element decreases while they are acidic character increases

on going down in a group of periodic table the basic character of oxides increases and acidic character of oxides decreases

.electronegativity

the way electronegative element increases along A period since the non metallic character increases
similarly it decreases down the group sensor non metallic character decreases.

Answer 2

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