Which of the following is the limitation of Newlands Law of Octaves

Newlands Law of Octaves states that

Dobereiner’s Triad suggests that

Which of the following is a Dobereiner’s Triad

Identify element from the following

Elements that have same atomic number but different mass number are called

Mendeleev failed to classify __ because

Mendeleev was failed to classify

The achievement of Mendeleev’s periodic table was

If Lithium forms Li2O then Sodium should form

The Periodic Law stated by Mendeleev was

Mendeleev arranged elements on the basis of

Mendeleev used formulies of ___ and ___ for classification of elements

Identify Metalloids from the given elements

In period, atomic radius decreases because

Metallic character in period decreases because

In periods, metallic character __ and non-metallic character __

Atomic size increases in __ and decreases in __

In groups valency__ and in period valency__

Valency of Ca with atomic number 20 is

Maximum number of elements that can be accommodated in a shell can be calculated by

In a period atomic number increases by

There are __ groups and __ periods in Modern Periodic Table

Modern periodic Law states that

In period, atomic radius decreases because

Metallic character in period decreases because

In periods, metallic character __ and non-metallic character __

Atomic size increases in __ and decreases in __

In groups valency__ and in period valency__