The discovery of the fission reaction proved that the atom is not indestructible.
Fission is a process by which an atom is split to to produce two atoms, smaller in size than the original atom. In addition the mass of the system after a standard fission reaction is less than the mass of the system before the reaction, some of the mass having been converted to energy. This indicated that it is possible to completely "destroy" an atom (although it is merely converted to a different form).
Fission was first observed in 1938 by Otto Hahn who observed that after bombarding a uranium nucleus with neutrons, the much lighter barium was produced.
need a picture of ruthersford idea of what an atom looked like
john Dalton
The term atomos is Greek and means, roughly, "undivisable." It simply refers to anything that cannot be further split into any part. The modern concept of the Atom was introduced by Leucippus, further expounded by Democritus, and defined again by Lucretius. Lucretius is commonly given credit for the atom as we know it today. As for the discovery of the properties of the atom, John Dalton and his assistant found the weight of an atom.
heating it
In the 5th cent. B.C. the Greek philosophers Democritus and Leucippus proposed that matter was made up of tiny, indivisible particles they called atom, or in Greek "a-tomos". The reason why they assumed this is because nothing can come from nothing. Around 1803, John Dalton (1766-1844) developed the first useful atomic theory of matter. He imagined the atom as a sphere full of an electrically positive substance mixed with negative electron. Then in 1897, Thompson discovered the first component part of the atom: the electron, a particle with a negative electric charge.Discovery of the AtomBy the 19th century, technology had advanced greatly and many elements had been discovered to work with. Using the available elements scientist such as John Dalton and Amedeo Avogadro forced them to interact with one another. From these interactions they were able to prove the existence of the atom.AnswerThat depends on exactly what you mean by "discovered."Jainism had a concept of small particles similar to atoms in the 6th millennium BC, and either Democritus or his mentor Leucippus (or possibly both together) independently came up with the idea (and the word "atomos", which is Greek for "uncuttable") in the 5th century BC. However, these were essentially lucky guesses; there was no real scientific basis behind them, so saying these people "discovered" atoms is a pretty big stretch.The best candidate is probably John Dalton, who in the early 19th century proposed (based this time on experiments) that substances were composed of tiny discrete particles, and even assigned relative weight values to several types of these particles. The word Democritus had used was "Englishified" slightly to come up with the modern word "atom" to refer to these particles.AnswerJohn Dalton was the first who introduced the idea of atom. Atom, the very word, means inseparable or indivisible. Based on that idea in chemistry many laws have been stated such as, law of coservation of mass, law of multiple proportions etc etc.
Its RADIOACTIVITY!! That was the first discovery that rejects the idea that the atom is indestructible
General relativity (Loosely speaking, e = mc^2) What's more, it's not just the theory that has proved that an atom can be destroyed; experimental data does too. The most famous example of this is the atomic bomb; atoms are converted into pure energy and...well you've probably seen pictures of what the explosion looked like. I hope this answers your question. PS: The atoms isn't technically lost, it's just converted into a form that has no mass
Dalton. Dalton's atomic theory stated that atoms are indivisible and indestructible and unchangeable.
Socrates rejects the idea of escape because he believed it would be unjust to disobey the laws of the city, as doing so would undermine the social order. Additionally, he felt it was his duty to abide by the laws and accept the consequences of his actions, even if it meant facing death.
Relativism or Relativity
Moral relativism is the philosophy that rejects the idea of universal values, believing that moral principles are subject to cultural, historical, and individual differences.
The idea that atoms are indivisible and indestructible, and the idea that all atoms of the same element have the same mass.
He didn't have proof of a force causing the movement
democritus
know idea
Veto does not mean to accept. Veto means one rejects the idea completely.
Democritus from Abdera