among the elements He,N,Mg,Be the elements which belong to same periodic Modern Periodic Table
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Explanation:
N & Be second period........
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Elements belonging to same periodic table are - Nitrogen and Beryllium.
Periodic table is made of 7 periods and 18 groups.
Horizontal rows represent period while vertical columns represent groups.
Helium belongs to first period. It is a noble gas.
Magnesium belongs to third period. It is alkaline earth metal.
Nitrogen and Beryllium are the only ones belonging to second period. Nitrogen is non metal. Beryllium is metal.
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