Question

What did John Dalton's atomic theory state?

Answer 1

See below:

Explanation:

It states that:

-All matter is composed of atoms that can't be broken down (they are indivisible and indestructible)
-Atoms of the same element have identical properties (same mass and properties)
-Atoms of different elements have different properties
-Atoms combine to form compounds

Note: The first two bullet points of his theory have been disproved.