Question

10) Give the postulates of Dalton's atomic theory.
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Answer 1

ANSWER:⤵️

• All matter is made of atoms.
• Atoms are indivisible and indestructible.
• Compounds are formed by a combination of two or more different kinds of atoms.
• A chemical reaction is a rearrangement of atoms.

Answer 2

Answer

The five postulates of John Dalton's atomic theory are :-

• All matter is made up of tiny, indivisible particles called atoms.

• Atoms can neither be created nor destroyed.

• Atoms of a specific element are identical in all aspects (physically and chemically).

• Atoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds.

• A chemical reaction is a rearrangement(separation or combination) of atoms.

Note:- The words in the brackets are for better understanding only.

 Extra Points

$\red\bigstar$ Dalton's atomic theory was first published  in the year 1808.

$\blue\bigstar$ Dalton's atomic theory had many drawbacks , so it is not in use now a days.

$\bigstar$ Some of the drawback of  Dalton's atomic theory are :-

• Dalton stated that atoms are indivisible but subatomic particles were discovered later.

• Dalton do not stated about isotopes , isobars or allotrophs that are atoms of same elements with different properties.