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 row 1 (or better period 1)
Helium is in the first period of the periodic table.
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.