A bunch of elements can have 18 neutrons because of isotopes in the world
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
argon
group 18
Argon, Ar, has the atomic number of 18 on the Periodic Table of Elements.
Helium is located on the group 18 and period 1 on the modern periodic table.
35, 16, and another number. S=Sulfur off the periodic table.
periodic table is classified into groups and periods.There are 18 groups and 7 periods in periodic table.
Argon.
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
Chlorine-35, the most common isotope at 75%.
Argon (Ar, element number 18) is the last element in the third period of the periodic table.
The periodic table of Mendeleev has 18 groups and 7 periods.
argon
group 18
group 18
Argon, Ar, has the atomic number of 18 on the Periodic Table of Elements.
Helium is the element that is placed in period 1 and group 18 of the periodic table. It is inert in nature and hence stable.