Class 10 Science Periodic Classification of Element: NCERT Solutions for Question 1

This page focuses on the detailed Periodic Classification of Element question answers for Class 10 Science Periodic Classification of Element, addressing the question: 'Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.'. The solution provides a thorough breakdown of the question, highlighting key concepts and approaches to arrive at the correct answer. This easy-to-understand explanation will help students develop better problem-solving skills, reinforcing their understanding of the chapter and aiding in exam preparation.

Question 1

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

Answer

Yes, there is only one triad of Dobereiner’s triads exists in the columns of Newlands’ octaves. The elements Li, Na, and K of Dobereiner’s triads also occurred in the columns of Newlands’ octaves.

Dobereiner could only find three triad from the elements known at that time.

Dobereiner’s triads

Li Ca Cl

Na Sr Br

K Ba I

Newlands’ octaves

H	Li	Be	B	C	N	O
F	Na	Mg	Al	Si	P	S
Cl	K	Ca	Cr	Ti	Mn	Fe
Co	Cu	Zn	Y	In	As	Se
Br	Rb	Sr	Ce and La	Zr	-	-

Class 10 Science Periodic Classification of Element: NCERT Solutions for Question 1

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

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