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The reason it can be placed in group II is because it has 2 electrons in its outside shell (also its only shell) and the groups represent how many electrons in the elements outside shell, the reason it is normally placed in group 8 or 0 is because the first shell has a maximum of 2 electrons and all elements that have a full outside shell are placed in group 8/0 and can't normally react.

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โˆ™ 2010-02-16 10:39:04
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Q: Why can helium be placed in group II?
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Why is helium not placed in second group?

Similar to group 18 elements (or noble gases), helium is chemically inert and it has completely filled orbitals. Hence helium is place along with group 18 elements.


What gas does helium falls in.?

Helium (He) is a noble (inert) gas placed in the group 18 of the periodic table.Helium falls in inert gas. It is stable and non-reactive.


Why is Helium placed in group 18 on the periodic table?

We all know that helium is a noble gas. It has atomic number 2 but it is placed in 18 group be because in 1st group the elements have only one electron in thier s orbital e.g. Hydrogen, lithium, sodium, potassium etc. But helium has two electron so it cannot exist in 1 group. In second group the s orbital are same but the physical and properties of helium is different from the elements present in second group. According to modern periodic table elements which have same physical properties are placed in same group. Since helium is an inert gas and its physical properties are similar to the other elements of the 18 group and also helium discoverd late so that hilium can be put in the 18 group


Why is helium with only two electrons placed in group VIII of the periodic table?

The outer most orbitals of helium and other noble gases have completely filled orbitals. Hence helium is placed along with the other noble gases.


Why is helium placed in group vii?

It isn't, it is in group viii and that is due to the full outer shell or 1s orbital.


Why is helium's position not justified in periodic table?

Helium has 2 valence electrons and it should theoretically be placed along with group 2 elements. But since helium has completely filled orbitals (as do the noble gases), it is placed along with the noble gases.


What is the symbol for He in the periodic table?

He is the symbol of Helium element. It is placed in group-18 of periodic table.


Why is neon in the same group of periodic table as helium?

Neon and helium fall under the same column in the periodic table. Both has stable electron shell.


Where is helium placed on the periodic table?

helium is placed on the periodic table with all the otheres :)


Why is helium placed in group 18?

Helium has a full outmost valence shell. It is a nobel gas. it doesn't react with other chemicals. because the atomic number is 2 so it has to be in group 18 as it also has noble gases.


What group does helium belong to?

Helium belongs to group 18.


What is the periodic table group for helium?

helium is in group 18


What is the group number for helium and carbon?

group 18 for helium and group 14 for carbon


If an atom in group 18 is placed near an atom of group 2 what will usually happen?

Nothing. Group II metals are reactive, but the group 18 or inert gases are not.


Is helium in a group listed on the periodic table?

Helium is not a group. It is an element.


Is helium an atom?

Yes helium is an atom. It is stable. It is placed in group 18.Yes, helium is a monoatomic molecule. It is stable itself as it has already achieved maximum possible electrons in its outermost shell. It is the only element in group 18 without 8 electrons in valence shell.


What is the position of helium on the periodic table snd its chemical properties based on that position?

Helium is placed at the top of the group-18 in periodic table. Its valence shell contains 2 electrons. It is inert in nature like other elements of group-18.


Helium period number?

Helium is placed in the first period.


What is the group name in which helium is found?

Helium is a Noble Gas in Group O.


What is the element in period one and group 8 of periodic table?

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.


Where is helium located?

Helium is located in group-18 of the periodic table. It is the first element of this group.


Why is helium in group 18 in the periodic table?

We all know that helium is a noble gas. It has atomic number 2 but it is placed in 18 group be because in 1st group the elements have only one electron in thier s orbital e.g. Hydrogen, lithium, sodium, potassium etc. But helium has two electron so it cannot exist in 1 group. In second group the s orbital are same but the physical and properties of helium is different from the elements present in second group. According to modern Periodic Table elements which have same physical properties are placed in same group. Since helium is an inert gas and its physical properties are similar to the other elements of the 18 group and also helium discoverd late so that hilium can be put in the 18 group


Why the helium is not included in noble gases group?

Helium is include in the group 18 along with the noble gases.


Which group helium belong?

group 18


Is helium or lithium more like hydrogen?

Hydrogen is more like Helium as it is a gas and will combust in the presence of oxygen.Even though hydrogen is placed in the same group as all the reactive metals such as sodium and potassium, this is one exception where the properties hydrogen does not match the others in the same group.

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