John Dalton's atomic theory to Today's structure
John Dalton’s atomic theory given the primary basis of chemistry. But present-day electrons holds the key to the chemical structure. Thus for better understanding the atomic properties of an element we need to know about their electronic structure.
Dalton’s atomic theory based on the following assumption
- Matter made of atoms is indivisible and indestructible.
- All the atoms of a given element are identical mass and properties.
- Compounds formed by the combination of two or more same or different kinds of atoms.
- A chemical reaction is a rearrangement of atoms.
Limitations of Dalton's atomic theory
The journey from John Dalton’s atomic theory to the modern structure of an atom is a long and arduous one.
He considered the atom was the smallest building block of matter and nothing smaller exist. But as we turn this century many valuable pieces of information given about atomic structure.
It clearly indicated that Dalton’s atomic theory did not grant to its position. Today an atom composed further subatomic particles like electron, proton, and neutron.