Answer:assimilation
Explanation: assimilation is a term used by Piaget to refer to how children associate new information with their pre-existing knowledge. So when they learn something new they try to relate it to what is already preserved in the pattern of knowledge in their mind. It this process thy don't change their schemas (pattern of information ) but they just relate it to what they already know . Accomodation is when they change the existing Information to fit in the new information.
An atom is in a stable form when its outer electron shell is full and electronic configurations having duplet structure means two valence electrons and octet structure means eight valence electrons have the greatest stability. Most atoms of elements have no stable configuration and to achieve stable configuration they react with other atoms to transfer, share or receive electrons.
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Opium wars is the name given to the 19th century conflict between Britain and China, which centered around a dispute between a specific and illegal good being imported into China by English merchants.