Classification ...

In $$F$$ and $$Cl$$  which one has higher electron affinity :

State the electronic configuration for Helium [$$p=2,\ n=2$$].

Refer to changes in properties of elements  on moving left to right across a period of the periodic table.For each property , choose the letter corresponding to the correct answer from A,B,C and D.

The electron affinity of the elements in groups 1 to 7 :

Identify the elements in the Periodic Table:

A: Which shows diagonal relationship to $$Be$$

B: Which shows diagonal relationship to $$Li$$

An element in period 3 whose electron affinity is zero is:

Atomic number of an element $$X$$ is $$16$$ its group number will be :

'Electronic configuration' represents :

Match the statements in List I with the correct answers in list II

Which element  is considered radioactive among the options given below?

Electron affinity on moving down the group in the periodic table: