Question

What is the Dalton atomic model?

Answer 1

Dalton proposed his model of an atom .It is often referred to as a billard ball model. He defined an atom to be a ball like structure as the concept of atomic nucleus and electrons were unknown at the time

Answer 2

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The concept that matter is compeed of pande was given by Indian and Greek philosophie The philosopher Democritus (460 - 370 BC) suggested that the ultimate pamide of a matter to the atom. The word 'atom' has been derived from the Greek word 'atomos' meaning indivisible. The old ideas were put on a scientific scale by John Dalton in the form of a theory, known Dalton's theory.

$\huge\mathtt{\underline{\underline{Postulates:-}}}$

Main postulares of this theory are as follow.

• Matter consist of minute, indivible, indestructible particle, called atoms.
• Atoms of the same element are identical to each other. They have the same mass and size.
• Atoms of different elements differ in properties and have different masses and sizes.
• Compounds are formed when atoms of different elements combine with each other in simple numerical ratios and the relative numbers and kind of atoms are always the same in a gwen compound.
• Chemical reactions involve reorganisation of atoms. These are neither created nor destronadana chemical reaction.