Question

which of the following is a stable element ​

Answer 1

Answer:

Elements having the maximum number of electrons that can be accommodated in their last shell or orbit are known as stable elements.

In the case of Helium , the helium atom contains only one shell . The maximum number of electrons that can be accommodated in the first shell is two. Therefore the 'two electron’ pattern system of helium is stable.Most of the stable elements are having 'Octet Electron Configuration'.

Other examples are Neon(Ne), Argon(Ar), Krypton (Kr), Xenon (Xe), Radon (Rn).

Usually these elements do not take part in chemical reaction, because they are chemically stable elements. These elements are also known as noble gases and 18th group elements

Answer 2

Answer:

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