Advertisement Remove all ads

How Do the Valency and the Atomic Size of the Elements Vary While Going from Left to Right Along a Period in the Modern Periodic Table? - Science

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?

Advertisement Remove all ads

Solution

Variation in valency

On moving from left to right in the periodic table, valency increases up to 4 and then decreases.

  • The electrons present in the last shell determine the valency of a particular element.
  • If the number of valence electrons is less than or equal to 4, valency = number of valence electrons
  • If the number of valence electrons is more than 4, valency = 8 - number of valence electrons

Variation in atomic size:-

Atomic size decreases along a period. This is because on moving across a period, the number of valence shells remains the same and the electrons increase by one unit. As a result, the nuclear charge increases and thus, the atomic radius decreases.

Concept: Periodic Properties
  Is there an error in this question or solution?

Video TutorialsVIEW ALL [2]

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×