Question

what do you understand by the term valency? How will you correlate valency with the group number in the modern periodic table ​

Answer 1

Answer:

Explanation:

Valency is the no of electrons present in the outer most orbit of an atom.

In a group each element has same valency.

Group I has 1 electron in its outermost orbit.

Group 2 has 2 electrons in its outermost orbit.

Group 13 has 3 electrons in its outmost shell and so on.

Answer 2

Here is ur answer mate....

Explanation:

Valency of an element is the number of hydrogen atoms which can combine or displace with one atom of an element forming a compound.The valency of an element depends on the number of electrons in the outer shell of an atom I valence electrons.

Valency and group number are related to each other as group 1 has 1 valence electrons and group 2 has 2 valence electrons and so on