Democritus believed that
atoms were uniform, solid, hard, incompressible, and indestructible and that they moved in infinite numbers through empty space until stopped
. Differences in atomic shape and size determined the various properties of matter.
What did Democritus say about the atom quizlet?
Democritus (460-370 B.C.): All matter can be divided into indivisible atomos. Democritus believed
that everything in the universe was composed of atoms, which were themselves microscopic and indestructible
. Aristotle was an influential Greek philosopher who lived between 384-322 B.C.
What did Democritus discover about the atom?
One of the first atomic theorists was Democritus, a Greek philosopher who lived in the fifth century BC. Democritus knew that
if a stone was divided in half, the two halves would have essentially the same properties as the whole
. … He called these small pieces of matter “atomos,” the Greek word for indivisible.
What did Democritus say about the atomic theory?
The theory of Democritus held that
everything is composed of “atoms,” which are physically, but not geometrically, indivisible
; that between atoms, there lies empty space; that atoms are indestructible, and have always been and always will be in motion; that there is an infinite number of atoms and of kinds of atoms, …
What did Democritus get wrong about atoms?
2,500 years ago, Democritus suggested that all matter in the universe was made up of tiny, indivisible, solid objects he called “atomos.” However, other Greek philosophers disliked Democritus’ “atomos” theory because they felt it was illogical. …
Atoms cannot be subdivided, created, or destroyed
.
Who discovered the atom?
The idea that everything is made of atoms was pioneered by
John Dalton
(1766-1844) in a book he published in 1808. He is sometimes called the “father” of atomic theory, but judging from this photo on the right “grandfather” might be a better term.
What did John Dalton find out about atoms?
A theory of chemical combination, first stated by John Dalton in 1803. It involves the following postulates: (1)
Elements consist of indivisible small particles (atoms)
. (2) All atoms of the same element are identical; different elements have different types of atom. (3) Atoms can neither be created nor destroyed.
Why did Aristotle reject Democritus idea of the atom?
Believed atoms were mechanically bound. Aristotle: He rejected Democritus atomic theroy and
didn’t think atoms move through empty spaces because he didn’t think that empty spaces existed
. He believed that all matter consisted of four elements.
Who said atoms contain mostly empty space?
In 1911, a British scientist named
Ernest Rutherford
discovered that an atom is mostly empty space. He concluded that the positively charged particles are contained in a small central core called the nucleus.
What was Democritus theory quizlet?
What was Democritus’s Contribution to Atomic Theory (What is “Atomos”)? He
proposed that matter, when small enough, reaches a point where it can no longer be divided and becomes atoms, meaning “indivisible.”
How did the concept of an atom evolve?
Greek Origins
The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with
the Greek philosopher Leucippus of Miletus and his student Democritus of Abdera in the 5th century B.C.
(The word atom comes from the Greek word atomos, which means ? indivisible.?)
What was the first concept of an atom?
The concept of the atom (Greek: atomos, “indivisible”), an indivisible particle of matter, goes back to ancient Greece and a man named Democritus, a rival of Aristotle. Democritus held that
all matter could be subdivided only until some finite particle was reached
.
What did Aristotle believe about the atom?
Aristotle did not believe in the atomic theory and he taught so otherwise. He thought that
all materials on Earth were not made of atoms
, but of the four elements, Earth, Fire, Water, and Air. He believed all substances were made of small amounts of these four elements of matter.
What is a fun fact about Democritus?
He was
best known for the development of the most accurate early atomic theory of the universe
. He is also known as ‘the Laughing Philosopher’ as he was often cheerful while at work. It is believed that Democritus was born around 460 BCE in Abdera, Thrace. He studied under Leucippus in Thrace.
Who discovered electron?
Although
J.J. Thomson
is credited with the discovery of the electron on the basis of his experiments with cathode rays in 1897, various physicists, including William Crookes, Arthur Schuster, Philipp Lenard, and others, who had also conducted cathode ray experiments claimed that they deserved the credit.
How did Democritus reason for the existence of atoms?
Democritus thought that different kinds of matter vary because of
the size, shape, and arrangement of their atoms
. … Differences in the weight of matter, he argued, could be explained by the closeness of atoms. Atoms of lighter matter, he thought, were more spread out and separated by more empty space.
