Which of the following element does not belong to the family of elements indicated [Orissa JEE 1997]

Argon (Ar, Z = 18) : Nobel gases

Rubidium (Rb, Z = 37) : Alkali metals

Barium (Ba, Z = 56) : Alkaline earth metals

Iridium (I, Z = 77) : Nobel gases

Which of the following element does not belong to the family of elemen

1.	Which of the following element does not belong to the family of elements indicated [Orissa JEE 1997]
A.	Rubidium (Rb, Z = 37) : Alkali metals
B.	Barium (Ba, Z = 56) : Alkaline earth metals
C.	Iridium (I, Z = 77) : Nobel gases
D.	Argon (Ar, Z = 18) : Nobel gases
Answer» D. Argon (Ar, Z = 18) : Nobel gases

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Which of the following element does not belong to the family of elements indicated [Orissa JEE 1997]

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