How were the ideas of atomic structure developed?

Answer 1

Dalton's atomic theory had five main points:

1) All elements consist of minuscule particles called atoms.

2) All atoms of a given element have are identical to each other.

3) All atoms of a given element are different than those of other elements.

4) Atoms of one element combine with other elements to create compounds. They always combine in equal amounts.

5) Atoms cannot be created, divided, nor destroyed.

Most of the above is still accepted by scientists today, except for a few points. First, the discovery of nuclear fusion/fission and radioactivity prompted revision of point #2. Isotopes prove that atoms of the same element can actually have small differences due to a different number of neutrons. Also, the existence of ions with varying numbers of electrons also contradicts this point.

Answer 2

The ancient philosopher, Heraclitus, maintained that everything is in a state of flux. Nothing escapes change of some sort (it is impossible to step into the same river). On the other hand, Parmenides argued that everything is what it is, so that it cannot become what is not (change is impossible because a substance would have to transition through nothing to become something else, which is a logical contradiction). Thus, change is incompatible with being so that only the permanent aspects of the Universe could be considered real.

An ingenious escape was proposed in the fifth century B.C. by Democritus. He hypothesized that all matter is composed of tiny indestructible units, called atoms. The atoms themselves remain unchanged, but move about in space to combine in various ways to form all macroscopic objects. Early atomic theory stated that the characteristics of an object are determined by the shape of its atoms. So, for example, sweet things are made of smooth atoms, bitter things are made of sharp atoms.

In this manner permanence and flux are reconciled and the field of atomic physics was born. Although Democritus' ideas were to solve a philosophical dilemma, the fact that there is some underlying, elemental substance to the Universe is a primary driver in modern physics, the search for the ultimate subatomic particle.

Answer 3

First and foremost John Dalton introduced about the concept of atom

Then Prout assumed that all elements are made up of hydrogen

Later J J Thomson introduced the watermelon model of atom. The negatively charged electrons are emedded in a positive ball

Then came Ruther Ford with planetary model

Accoding to him, electrons go around the nucleus whose diameter of the order of

10-15 m

Due to some discrepancies, Bohr introduced stable orbits for electron to go around

Then Sommerfeld came into the scene

Finally we have vector atom model

Answer 4

In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms, as opposed to the earlier concept which held that matter could be divided into any arbitrarily small quantity.

Answer 5

Atomic theory grew as a series of models that developed from experimental evidence. As more evidence was collected, the theory and models were revised.

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Answer 6

history map of the development of atomic theory

Answer 7

the ideas were developed by blizzard creations 2002 warcraft

Answer 8

Atomic theory grew as a series of modles that developed from expiremental evidence. As more evidence was collected the theory and modles were revised.