Periodic Classi...

Name the following with reference to the elements of the modern periodic table.

The alkali metal in period 2 

Which has more non-metallic character from the elements $$' X'$$ and $$' Y'$$, with electronic configurations $$2, 8, 5$$ and $$2, 8, 6$$ respectively?

Element 'B' in period 2 is to the right of element 'A'.
Element 'B' is likely to be ____non-metallic in character than element 'A'

The type of elements present in group 18[0] are :

Atomic weight of which set of elements were corrected by Mendeleev?

The type of elements present in group 17 [VIIA] are :

The number of valence electrons ___________ across a period and ________ down the group:

Which of the following can be classified as Dobereiner's triads?

In which part of a group would you separately expect the elements to have the greatest metallic character?

In the periodic table, the metallic character of element :