Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
Which element shown in the table has the electronic configuration 2, 8, 1?
Which element shown in the table has the electronic configuration 2, 8, 1?
- Na (correct)
- K
- Li
- H
What is the valency of elements in group 14?
What is the valency of elements in group 14?
- 1
- 3
- 4 (correct)
- 2
Which pair of groups has elements with a valency of 3?
Which pair of groups has elements with a valency of 3?
- Group-2 and Group-13
- Group-14 and Group-15
- Group-13 and Group-16
- Group-13 and Group-15 (correct)
What happens to the valency of elements as you move down a group?
What happens to the valency of elements as you move down a group?
Signup and view all the answers
Which unit is used to measure atomic size?
Which unit is used to measure atomic size?
Signup and view all the answers
What is the relation between the valency and the nature of electrons (gain or loss)?
What is the relation between the valency and the nature of electrons (gain or loss)?
Signup and view all the answers
Flashcards are hidden until you start studying
Study Notes
Down the Group
- The valency of elements in a group remains constant because they have the same valence electrons.
- The group number can be used to determine the valency of an element.
Valency of Elements in Different Groups
- Group 1 elements have a valency of 1, which means they lose one electron to achieve stability.
- Group 2 elements have a valency of 2, which means they lose two electrons to achieve stability.
- Group 13 elements have a valency of 3, which means they lose three electrons to achieve stability.
- Group 14 elements have a valency of 4, which means they share four electrons to achieve stability.
- Group 15 elements have a valency of 3, which means they gain three electrons to achieve stability.
- Group 16 elements have a valency of 2, which means they gain two electrons to achieve stability.
- Group 17 elements have a valency of 1, which means they gain one electron to achieve stability.
- Group 18 elements have a valency of 0, which means they neither gain nor lose electrons to achieve stability.
Atomic Size
- Atomic size is measured in terms of atomic radius.
- Atomic radius is the distance between the centre of a nucleus and the outermost shell.
- Atomic radius is measured in picometres (pm), with 1 pm equal to 10^-12 meters.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
