Q8 why do elements react chemically to form a compound
Answers
Answer:
To achieve a stable state.
Answer:To attain stability by achieving octet configuration.
Explanation:
According to octet rule the elements having 8 electrons in the outermost shell are stable and have less energy.
The noble gases are stable due to this inert gas configuration [except He which has 2 electrons satisfying duplet configuration] - Ne,Ar,Kr,Xe,Rn
So the remaining elements react with each other to form compounds (generally by losing,gaining or sharing electrons) with 8 elecrons in outermost shell to lower their energy and attain stability.
The compounds with 18 electrons in their outer most shell are also considerably stable - termed as pseudo [false] inert gas configuration.
Eg: Cu+ in CuCl.
The elements having half filled orbitals are also stable and generally less reactive. Eg: Nitrogen.