Question

explain the period tends in the morden periodic table by considering valency​

Answer 1

Answer:

Valency in the periodic table across a period first increases and then decreases. There is no change going down a group. However, this periodic trend is sparsely followed for heavier elements especially for lanthanide and actinide series.

Answer 2

Valency in the periodic table across a period first increases and then decreases . There is no change going down a group . However , this periodic trend is sparsely followed for heavier elements ( elements with atomic number greater than 20 ) , especially for lanthanide and actinide series .