Classification ...

A newly discovered element $$X$$ is placed in group $$IA$$ of the periodic table since it forms :

Element $$A$$ has electronic configuration 2,8,1 and $$B$$ has 2,8,7. Which one will have higher electron affinity?

Which of the following metal forms amphoteric oxide?

The element with highest electron affinity in the periodic table is:

On the four halogens, the one which has the highest electrons affinity is_______.

Which of the following has the highest electron affinity?

Which of the following burns to form an oxide, which is gaseous at room temperature?

Which of the following property generally decrease along a period?

Electron affinity depend on :

The elements with atomic numbers $$2, 10, 18, 36, 54$$ and $$86$$ are all______.