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Q.

Statement-A In periodic table, the horizontal rows are called periods. 

Statement-B In periodic table Vertical columns are called groups. 

Statement-C Atomic number of Calcium

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a

All The Statements A ,B and C are correct

b

All The Statements A ,B and C are incorrect

c

A,B are correct and C is incorrect

d

A,B are incorrect and C is correct

answer is A.

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Detailed Solution

In periodic table, the horizontal rows are called periods. 

In periodic table Vertical columns are called groups. 

Atomic number of Calcium is 20.

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