Question

what is atom nd elements????





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Answer 1

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✏ Elements and Compounds.

✒ Elements

• Elements are pure substances.
• Element has only one kind of atom.
• They are represented by symbols.
• In elements smallest particle is atom.
• We cannot divide element into two or more simpler substances by chemical or physical means.

✒ Compounds

• Compounds are impure substances.
• Compound have two or more kind of atom.
• They are represented by chemical formula.
• In compounds smallest particle is molecules.
• We can provide compound in two elements by chemical means.

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-: Additional Information :-

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✒ About Elements

• Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
• Example :-

1. Aluminium (Al)
2. Oxygen (O)

✒ About Compounds

• Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
• Example :-

1. Alcohol C2H6O
2. Acetic Acid C2H4O2

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