The difference between a molecule and a compound is that a compound is made up of atoms from .

A chemical change creates a new

Explanation:

The difference between the molecule and compound is that molecule is made up of atoms of same element while compound is made up of atoms from different elements.

Molecule:

When the atoms of same elements combine they form molecule. In molecule atoms are combined together by covalent bond.

For example,

H₂ is the molecule of hydrogen in which two hydrogen atoms combined together through covalent bond.

Compound:

When the atoms of different elements combine they form compound. In compound atoms are combined through ionic bond.

For example,

NaCl is compound it is formed by the combination of atoms of sodium and chlorine. The electron form sodium is gained by the chlorine and form ionic bond.

2) A chemical change creates a new species.

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) > 2H2O

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