# data[].attributes.body
440 BCE (Democritus)

# data[].attributes.body
440 BCE (Democritus)

# data[].attributes.body
440 BCE (Democritus)

# data[].attributes.headline
He conducted experiments in combining elements.

# data[].attributes.subject
He conducted experiments in combining elements.

# data[].attributes.body
1803 (Dalton)

# data[].attributes.headline
Atoms of the same element are exactly alike

# data[].attributes.subject
Atoms of the same element are exactly alike

# data[].attributes.body
1803 (Dalton)

# data[].attributes.headline
Atoms of different elements are different

# data[].attributes.subject
Atoms of different elements are different

# data[].attributes.body
1803 (Dalton)

# data[].attributes.body
1803 (Dalton)

# data[].attributes.headline
Elements combine in specific proportions

# data[].attributes.subject
Elements combine in specific proportions

# data[].attributes.body
1803 (Dalton)

# data[].attributes.headline
His theory of atomic structure led to the "plum-pudding" model

# data[].attributes.subject
His theory of atomic structure led to the "plum-pudding" model

# data[].attributes.body
1897 (Thomson)

# data[].attributes.headline
He conducted the cathode-ray tube experiment

# data[].attributes.subject
He conducted the cathode-ray tube experiment

# data[].attributes.body
1897 (Thomson)

# data[].attributes.body
1909 (Rutherford)

# data[].attributes.headline
There is a small, dense , positively charged nucleus

# data[].attributes.subject
There is a small, dense , positively charged nucleus

# data[].attributes.body
1911 (Rutherford)

# data[].attributes.body
1911 (Rutherford)

# data[].attributes.headline
Electrons move in a empty space of an atom.

# data[].attributes.subject
Electrons move in a empty space of an atom.

# data[].attributes.body
1911 (Rutherford)

# data[].attributes.body
1911 (Rutherford)

# data[].attributes.body
1913 (Bohr)

# data[].attributes.headline
Electrons jump between levels from path to path

# data[].attributes.subject
Electrons jump between levels from path to path

# data[].attributes.body
1913 (Bohr)

# data[].attributes.body
twentieth century (Schrodinger and Heisenberg)

# data[].attributes.headline
Electrons are found in electron clouds not paths

# data[].attributes.subject
Electrons are found in electron clouds not paths

# data[].attributes.body
twentieth century (Schrodinger and Heisenberg)