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Which of the following statements are no...

Which of the following statements are not correct ?

A

Germanium was earliner called eka-silicon

B

Moseley interduced the concept of atomic number as the basic of modern periodic law.

C

14 elements of 5th period are called lanthanoids

D

4th period begins with rubidium.

Text Solution

Verified by Experts

The correct Answer is:
C, D
14 elements of 6th period are called lanthanoids, 4th period begins with potassium.
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