around 2,500 years ago this Greek man called Democritus was sitting around just thinking. He was thinking about cutting stuff up and came up with the idea that there must be a point where you could no longer cut something any smaller. He named the atom after the Greek word atomos, which means that which can't be split. here...
Ancient Greek philosophers such as Democritus and Leucippus did not have experimental evidence to support their theory of the atom. Their idea of the atom was purely philosophical and lacked experimental verification until much later.
The idea that the atom is mostly empty space was first proposed by Ernest Rutherford based on his gold foil experiment in 1909. This experiment led to the discovery that most of an atom's mass is concentrated in a nucleus at the center, surrounded by electrons in vast empty space.
Democritus was an Ancient Greek philosopher who proposed the idea of the atom as the fundamental unit of matter, indivisible and indestructible. He believed that all matter is made up of these tiny, indivisible particles and that differences in properties arise from differences in the arrangement of these atoms.
The idea of the atom was first proposed by the ancient Greek philosopher Democritus in the 5th century BC. He believed that everything is made up of tiny, indivisible particles called atoms.
When a fluorine atom and a potassium atom come into contact, a reaction would likely occur where the fluorine atom will try to gain an electron from the potassium atom to achieve stability. This reaction would result in the formation of potassium fluoride, a compound consisting of one potassium ion and one fluorine ion.
democritus
Its RADIOACTIVITY!! That was the first discovery that rejects the idea that the atom is indestructible
Democritus from Abdera
Robert Boyle
Democritus did not have experimental evidence to support his idea of the atom. Instead, his idea was based on philosophical reasoning and speculation.
No device can give the complete structure of an atom but you can get a minute idea about the look of an atom using an Electron Microscope!
450 b.c
The idea of the atom was first developed by Greek philosophers Leucippus and Democritus in 5th century BC. Their idea was overlooked until Antoine Lavoisier's experiments were done in the 18th century.
John Dalton put forward the idea that each element is made of a different sort of atom. Each kind of atom had its own properties such as an individual mass.
manu
Democritus, an ancient Greek philosopher, is credited with championing the idea of the atom around 400 BC. He proposed that all matter is made up of tiny, indivisible particles called atoms, which come in different shapes and sizes. Though his ideas were not widely accepted at the time, they laid the foundation for modern atomic theory.
450 BC. Hope it answers your question =)