Periodic Classi...

The group in which all the elements do not have same number electrons in their valence shell is :

Non-metallic character ________ down the group.

Which of the following triads does not follow Dobereiner's law of triads?

The early attempt to classify elements as metals and non-metals was made by :

In Newlands classification, elements are arranged in an increasing order of their:

What happens to the number of valence electrons in atoms of elements as we go down a group in the periodic table?

Elements in a period have same :

What were the limitations of Newlands' classification?

Modern periodic law was proposed by :

The placement of elements in the Newlands' table was compared to: