Question

match the column
column 1. column 2
1)Helium. 1) period
2)Horizontal row. 2)group
3)zero group

plzz ans fast and give its reason

Answer 1

helium-zero group.because it is a noble gas
horizontal row-period.the horizontal rows in a periodic table are called periods.

Answer 2

"Helium - zero group

Horizontal row - period

The corresponding columns refer to the periodic table of elements. Helium falls within the 18th group of the table, which consists of inert gas elements.

Since the valency of these elements is zero, in other words, their valence shell is completely filled; therefore the group is called the zero group.

Every horizontal row in the periodic table is referred to as a period.

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