Define the following terms giving one example in each case :
(i) Element
(ii) Compound
(iii) Mixture.
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3
Answer:
Element Definition:
Elements – Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
Compound Definition:
Compounds – Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
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4
Answer:
(i) is Element : A substance that can not split into two or more simpler substance by chemical methods.Examples : Carbon, aluminium
(ii) Compound : A substance consisting of two or more elements combined chemically in a fixed portion by mass
Example : water and sodium chloride.
(iii) Mixture : Mixture is substance that is made up of two or more particles or substances mixed by physical process.
Examples -Gold , Diamond, Graphite
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