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group 18 elements are what we call noble gasses. This means that their most outer shell called the valence shell has all 8 electrons.
The reason why other elements are reactive is because all elements want to have a full valence shell because it makes them more stable.
The noble gasses have a full shell so they are not very reactive.
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∙ 15y ago
Anonymous
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∙ 12y agoGroup 18 elements don't form compounds with other elements because they have their full octet (all 8 valence electons in their valence shell) so they have no reason to combine, they don't give up any electons and don't need to gain any electrons
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∙ 12y agoThe group 18 elements (the noble gases) have a completely filled set of orbitals with 8 valence electrons (this is very stable due to the Octet Rule). He, Ne and Ar have no known compounds but Kr and Xe which have vacant f orbitals can form compounds such as KrF4 and XeF4.
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∙ 12y agoBecause they already have full outer shells
Wiki User
∙ 12y agoBecause their velence shell is stable
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Why do elements in group 4A do not form ionic bonds?
Group-14 elements share electrons. they form covalent bonds.
Why do group 4a elements tend to form covalent bonds?
Why does group 4A elements tend to form covalent bonds rather than ionic bonds? 
What is a group of atoms that are held together by the energy of chemical bonds?
Molecule is a group of atoms. They are held by chemical bonds.
Which elements are most likely to react in the same manner in a chemical reaction?
A pair of elements in the same group are more likely to have similar properties. This is why groups are also called families. In the main group elements, groups 1,2, 13-18, the elements in a group have the same numbers of valence electrons in their outermost energy levels. This accounts for the fact that they behave in a similar matter in chemical reactions.
Why do elements in a group all behave similarly?
Elements in the same group behave similarly because they all have the same number of electrons in their outer-most orbits. These electrons are what determines the types of bonds and chemical reactions the atom can undergo.
What group of elements don't form chemical bonds?
Noble gases do not usually form chemical bonds.
Do The elements in group 18 of the periodic table which usually do not join in chemical bonds are called?
noble gases
Why do elements in group 4A do not form ionic bonds?
Group-14 elements share electrons. they form covalent bonds.
Why do group 4a elements tend to form covalent bonds?
Why does group 4A elements tend to form covalent bonds rather than ionic bonds? 
What are three elements that have similar chemical properties to oxgen?
Three elements that have similar chemical properties to oxygen are sulfur, selenium, and tellurium. These elements belong to the same group as oxygen in the periodic table and have similar electron configurations, which influence their reactivity and chemical behavior. Additionally, they can form similar types of chemical bonds with other elements.
What group number of elements do not often bond?
Elements in group 18 do not often form bonds.
Why some elements of 8A group do not form chemical bonds?
Elements in group 8A of the periodic table, known as the noble gases, do not readily form chemical bonds because they have a fully occupied valence shell of electrons. This stable electron configuration makes them highly unreactive, as they do not have a tendency to gain, lose, or share electrons with other elements. Consequently, noble gases exist as monoatomic gases and are generally chemically inert.
What is a group of joined by chemical bonds?
Molecule
What is a group of atoms that are held together by the energy of chemical bonds?
Molecule is a group of atoms. They are held by chemical bonds.
Which elements have similar properties on the periodic table?
The elements in the same groups usually do. Elements in the same group have same number of valence electrons and hence have similar chemical and physical properties.
Which elements are most likely to react in the same manner in a chemical reaction?
A pair of elements in the same group are more likely to have similar properties. This is why groups are also called families. In the main group elements, groups 1,2, 13-18, the elements in a group have the same numbers of valence electrons in their outermost energy levels. This accounts for the fact that they behave in a similar matter in chemical reactions.
What group of elements don't form covalent bonds?
generally group 1
