Question

Difference between chemical elements and compounds

Answer 1

Explanation:

Elements and compounds are pure chemical substances found in nature. The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Examples of elements include iron, copper, hydrogen and oxygen. Examples of compounds include water (H2O) and salt (Sodium Chloride - NaCl)

Elements are listed according to their atomic number on the Periodic Table. Among the 117 known elements, 94 are naturally occurring like carbon, oxygen, hydrogen etc. 22 are artificially produced having undergone radioactive changes. The reason for this is their instability due to which they undergo radioactive decay over a period of time giving rise to new elements during the process like Uranium, Thorium, Bismuth etc. Elements combine in fixed ratios and give rise to stable compounds due to chemical bonds that facilitate compound formation.

Answer 2

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☞ Differences between Elements and Compounds.

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✒ 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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