Ravi Shankar Sharma, Subha Raghavan and, Nidhi Sharma Solutions for Chapter: Periodic Classification of Elements, Exercise 7: MOCK TEST - 2

What is the cause of periodicity?

What are groups and periods?

What happens to the trend of valence electrons on moving from $\mathrm{L}\mathrm{i}$ to $\mathrm{K}$?

What happens to the trend of valency on moving from $\mathrm{B}\mathrm{e}$ to $\mathrm{C}\mathrm{a}$?

Define atomic radius.

How are the maximum number of electrons accommodated in a shell? Illustrate with an example for each shell.

Which period is incomplete?

How many elements can be accommodated in $5$th period?