period 1, group 18
1
Helium is located in period 1 on the periodic table.
The first period
Helium is in the first period of the periodic table.
heliums period address is 11.09
Helium is in the first period of the periodic table.
helium is in row 1 (or better period 1)
Helium is a period 1 element.
Helium
Helium is under group 18 and period 1. This makes helium a noble gas with the most electrons it can possibly have under stable conditions.
group 18, period 1
There are two elements in the first period, hydrogen and helium.