Question

match the column column 1. column 21)Helium. 1) period2)Horizontal row. 2)group 3)zero groupplzz ans fast and give its reason

Answer 1

1) column- group
2) Horizontal row- period
3) zero group- helium
there are 18 column in the modern periodic table and it is called as vertical column
there are 7 horizontal row in the modern periodic table and it is called as period
and helium is from zero group elements

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