period 1, group 18
Helium is in the first period of the periodic table.
helium is in row 1 (or better period 1)
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.
He, helium
group 18, period 1
Period 1 Group 0
1
The first period
Helium is in the first period of the periodic table.
period 1, group 18
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.