Question

write a note on features of period​

Answer 1

Characteristics of a Period

Valence electrons: The number of valence electrons in a period increase from 1 to 8 on going from left to right in a period. ...

Valency: Valency also varies on going from left to right in a period. ...

Atomic size: On going from left to right in a period, atomic size decreases.

Answer 2

Answer:

In the modern periodic table, the elements are arranged in the order of their increasing atomic number. In the modern periodic table, there are seven horizontal rows called periods and eighteen vertical columns (1 to 18) called groups. The arrangement of the periods and groups results in formation of boxes.