Question

Element belonging to the same group have the same valence

Answer 1

Explanation:

Elements belonging to the same group have the same valence electrons .

In the first group elements.

all elements valence shell has 1 electron.

In the second group elements.

all elements valence shell has 2 electron.

In the third group elements.

all elements valence shell has 3 electron.

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Answer 2

Answer:

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