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∙ 11y agoprotons
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∙ 11y agoErnest Rutherford
a cation atom!
an atom
The word Atom comes from the Greek a-tomos meaning uncuttable. Name by Democritus, who belived that matter is not continuous but made of tiny, indivisible grains of material, The Atom. We now know that this is not true as atoms are constructed from various ratios of protons & neutrons (which in turn as made up of quarks), and electrons.
J.J. Thomson is credited with the discovery of the electron in about 1904. He envisioned negatively charged "corpuscles" floating in a positively charged cloud, just like plums in a plum pudding. This was the "plum pudding" model of the atom, and it lasted until Geiger and Marsden conducted their gold foil experiment in about 1909.
The atom is the smallest known particle.
The smallest indivisible particle of an element is an atom. Each atom consists of a nucleus containing protons and neutrons, surrounded by electrons in orbitals.
is the smallest indivisible particle which can exists on its own eg. an atom of fluorine.
Either an atom or a molecule, depending on the substance.
The atom. Considered by Dalton to be indivisible and indestructible.
J.J. Thomson's discovery of the electron showed that atoms were not indivisible as Dalton thought, but were made up of smaller subatomic particles. This led to the development of the plum pudding model of the atom, which replaced Dalton's solid indivisible atom theory.
J.J. Thomson discovered the electron, a subatomic particle found in all atoms. This discovery led to his development of the plum pudding model of the atom, which revolutionized our understanding of atomic structure.
The discovery of the electron by J.J. Thomson in 1897 proved that the atom is not indivisible. This led to the development of the plum pudding model of the atom, which suggested that atoms are made up of smaller subatomic particles.
The Greeks named the tiniest particle of matter "atom," stemming from the Greek word "atomos" meaning indivisible. They believed atoms were the building blocks of all matter and could not be further divided.
No, he theorized that there was a small indivisible particle (he called the "atom" because it means indivisible), but he never did any experiments to prove his theory. Around the same time, Aristotle believed that matter could be divided infinitely. Both were considered speculation until the eighteenth century.
Rutherford's gold foil-alpha particle experiments led to the conclusion that atoms have a small, dense, positively charged nucleus at the center, surrounded by mostly empty space where electrons orbit. This discovery revolutionized the understanding of atomic structure, disproving the earlier model of the atom as a solid, indivisible sphere.
Atom