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Q: How many electrons does an atom need in its outer shell to be most stable and unreactive?
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What is the properties of argon?

Gas. Extremely unreactive. EXPLANATION: It is a noble gas (inert). This means it has a full shell of outer electrons. Atoms spend their lives trying to get a full shell of outer electrons because it will make them really stable, and they do this by reacting with other atoms. Argon has a full outser shell of electrons therefore it is stable and unreactive.


Why is krypton unreactive?

Krypton is a noble gas and has a particularly stable electronic configuration. That's why it may be very unreactive.


Why are elements like neon and argon unreactive?

Because they already have a full outer shell of electrons, which is the most stable configuration.


What is the group number for elements that have a stable number of electron spin their outer energy level?

The inert or noble gases have a stable full outer shell of electrons which is why they are so unreactive.


Why is noble gasses the least reactive?

they are unreactive as they have a full outer shell of electrons


Why are noble gases stable and unreactive?

Noble gases are stable because they have a complete outer shell - that is, eight valence electrons. Other elements react in order to gain or lose valence electrons, but noble gases are satisfied.


Is a noble gas an unreactive gas?

Yes, they are. The noble gases (group 18) on the periodic table of elements are unreactive because they have 8 electrons on their outer shell (valence electrons) and therefore they are very stable. Due to this stability, they will rarely react with any other chemical.


Using neon as an example explain why noble gases are unreactive?

he outer shell for electrons is full


Why is a noble gas different from other elements?

Beacause it has a full outer shell so is stable and unreactive


When is an element stable?

For an element to be stable, it must have a full outer shell (valence shell) of electrons. An element with a full outer shell of electrons will act like its nearest noble gas and be stable. Most elements require 8 valence electrons to be stable, however H needs 2.


What makes an element stable?

an element is stable when it has a full outer shell of electrons. to abide by the octet rule it must have a shell of 2 then 8 electrons. An element with a full outer shell (8) will be stable and act like its nearest noble gas.


Argon is a stable gas with a very high ionization energy Which statement explains why?

It has a full outer shell of electrons