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Which element was assigned Group III A in the Mendeleev's periodic table but is a member of Group-13 in the modern periodic table?

Which element was assigned Group III A in the Mendeleev's periodic table but is a member of Group-13 in the modern periodic table? Correct Answer Al

Concept: 

Mendeleev's periodic table 

Mendeleev's periodic table consists of 7 periods and 9 groups.

Elements are arranged in the increasing order of their atomic weights. 

The elements that have similar properties were placed in vertical columns. 

Explanation:

Mendeleev's periodic table

Elements assigned Group III A in Mendeleev's periodic table are B, Al, Sc, Ga, In, Y, La, Ti and Ac. 

Modern periodic table 

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Group 13 elements in modern periodic table B, Al, Ga, In, Ti and Nh.

The element was assigned Group III A in Mendeleev's periodic table but is a member of Group-13 in the modern periodic table Al.

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