Classification of elements

Group of 3 elements having similar chemical properties are called as ………………………

• Octaves

• Triads

• Duplets

• None of these

Newland law is also called …………………..

• Law of triads

• Periodic law

• Modern periodic law

• Law of octaves

Doberiener law is also called as ………………………………

• Law of octaves

• Law of triads

• Periodic law

• Modern periodic law

An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?

• 4th group

• 6th group

• 3rd group

• 2nd group

The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?

• N(7)

• P(15)

• Na(11)

• F(9)

Up to which element,law of octaves found to be applicable

• Oxygen

• Calcium

• Cobalt

• Potassium

The atoms along the zigzag line are called 

• metals

• nonmetals

• metalloids

• noble gases

The element having smallest atomic radius

The most electronegative element

The noble gas having smallest atomic radius.