Question

According to Newlands law of octaves 3rd element will resemble in its properties to -

• A. ninth element
• B. eighth element
• C. tenth element
• D. eleventh element

Answer 1

The correct option is C

tenth element

Explanation:

• Newlands arranged the elements in the increasing order of their atomic masses and suggested that the properties of the eighth element (starting from any one element) will have similar properties to that of the first element.

The Newlands classification is given by:

sa (do)	re (re)	ga (mi)	ma (fa)	pa (so)	da (la)	ni (ti)
H	Li	Be	B	C	N	O
F	Na	Mg	Al	Si	P	S
Cl	K	Ca	Cr	Ti	Mn	Fe
Co and Ni	Cu	Zn	Y	In	As	Se
Br	Rb	Sr	Ce and La	Zr	-	-

• The third element in Newlands classification is Beryllium (Be). It belongs to the third group. The eighth element from Be is Magnesium (Mg) which is the tenth element. The physical and chemical properties of third element (Be) will be similar to the tenth element (Mg).

Therefore, the correct option is (C) Tenth element.