Embibe Experts Solutions for Chapter: Periodic Classification of Elements, Exercise 1: Maharashtra Board-2018

Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen. 

The arrangement of elements in a group of three is known as _____.

State Newlands law of Octaves. 

Write the merits of the modern periodic table over Mendeleev's Periodic table. 

In Dobereiner's triads $\mathrm{Li}, \mathrm{Na}, \mathrm{K}$, the atomic masses of lithium and potassium are $6.9$ and $39.1$ respectively, then what will be the atomic mass of sodium. 

Write merits of Mendeleev's periodic table. 

According to Mendeleev's periodic law, properties of elements are periodic function of their _____

Give scientific reasons: 

Elements belonging to the same group have the same valency.