MEDIUM
10th CBSE
IMPORTANT
Earn 100

How valency of an element can be found out from its electronic configuration? Give three examples.

Important Questions on Periodic Classification of Elements

HARD
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 5 - Periodic Classification of Elements>Summative Assessment>Q 24
Atomic number is considered to be a more appropriate parameter than atomic mass for classification of elements in a periodic table. Why?
MEDIUM
10th CBSE
IMPORTANT
SCIENCE CHEMISTRY Part-II>Chapter 5 - Periodic Classification of Elements>Summative Assessment>Q 24
How does atomic size of elements vary on moving from (i) left to right in a period.
(ii) from top to bottom in a group. Give reason for your answer.