Question

Helium period,group,zero group

Horizontal row

Answer 1

hey mate here is your answer

helium is a noble gas

it is denoted by He

it's atomic no. is 2

it is present in 1 period

and 18 th group

hope it will help you

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Answer 2

your answer

helium is a inert gas it is unreactive

it is in 18 group (all inert gases are placed in 18)

atomic number 2 period 1

hope helps