Question

Element belong to the same group have same valency

Answer 1

Answer:

Elements in same group show same valency because they have same number of electrons in ther outermost shell i.e. Valence shell.Since valency depends upon the valence electrons so they have same valency. Elements in the same group have same valancy.

Explanation:

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Answer 2

Answer:

Hope it helps :)))

Explanation:

(i) Atomic radius is the distance between the centre

of the atom to its outermost shell.

(ii) New shells are added to the atoms of the elements

as we go down from top to bottom in a group.

(iii) The outermost electrons go further and further

away from the nucleus, extending the radius and

ultimately increase in the size of the atom. Hence,

atomic radius goes on increasing down a group