Firstly, helium does NOT belong to group 8. In the periodic table used until around the 1960s, helium belonged to group zero. Iron cobalt, and nickel families shared group VIII. In the modern, iupac sanctioned Periodic Table, the noble gas family -- helium, neon, etc. -- are in group 18.
I think the reason your teacher (? or textbook, or whoever) has asked this question is because all of the other noble gases have 8 electrons in their outermost shell, while helium has only 2.
these gases are the noble gases or inert gases. They are non reactive and have stable valence electrons
Helium is located on the group 18 and period 1 on the modern periodic table.
Helium is in the first period of the periodic table.
Helium is not a group. It is an element.
Helium is the element that doesn't belong in a group with any others on the periodic table. It is part of Group 18, the noble gases, which are characterized by their stable and unreactive nature.
these gases are the noble gases or inert gases. They are non reactive and have stable valence electrons
Helium is located on the group 18 and period 1 on the modern periodic table.
Helium is in the first period of the periodic table.
Helium is not a group. It is an element.
Helium is the element that doesn't belong in a group with any others on the periodic table. It is part of Group 18, the noble gases, which are characterized by their stable and unreactive nature.
Helium is one of the noble gasses.
Group 7 of the periodic table.
Helium is in Group 18 (also known as the noble gases) and in the top row of the periodic table.
Group 18
It is a noble gas - group 18.
Group 16
group 4