Differbetween
- What feature of Dalton's atomic theory is different from modern atomic theory?
- What are two problems with Dalton's atomic theory today?
- What is a main difference between Dalton's atomic model and Greek theory?
- Why was Dalton's theory a modern theory?
- What is Dalton's atomic theory?
- What is the modern atomic theory?
- Who proved Dalton wrong?
- What are the 5 points of Dalton's atomic theory?
- Who invented electron?
- Is Dalton's theory still accepted today?
- What are the similarities and differences between Thomson's and Rutherford's atomic models?
- What discovered Dalton?
What feature of Dalton's atomic theory is different from modern atomic theory?
Which feature of Dalton's atomic theory is different from modern atomic theory? atoms cannot be destroyed.
What are two problems with Dalton's atomic theory today?
Drawbacks of Dalton's Atomic Theory
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions. According to Dalton, the atoms of same element are similar in all respects.
What is a main difference between Dalton's atomic model and Greek theory?
According to Dalton's theory, atoms are identically same, but Democritus had no idea about it. Atoms are never created nor destroyed, they just rearrange. (Democritus was unfamiliar with the chemical reactions)
Why was Dalton's theory a modern theory?
Although two centuries old, Dalton's atomic theory remains valid in modern chemical thought. 1) All matter is made of atoms. Atoms are indivisible and indestructible. 3) Compounds are formed by a combination of two or more different kinds of atoms.
What is Dalton's atomic theory?
Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. ... The first part of his theory states that all matter is made of atoms, which are indivisible. The second part of the theory says all atoms of a given element are identical in mass and properties.
What is the modern atomic theory?
The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different. ... Each element has its own characteristic atomic number. Atoms of the same element can have different numbers of neutrons, however.
Who proved Dalton wrong?
Atomic Theory. In 1897, English physicist J. J. Thomson (1856–1940) disproved Dalton's idea that atoms are indivisible. When elements were excited by an electrical current, atoms break down into two parts.
What are the 5 points of Dalton's atomic theory?
Terms in this set (5)
Compounds are composed of atoms of more than 1 element. The relative number of atoms of each element in a given compound is always the same. Chemical reactions only involve the rearrangement of atoms. Atoms are not created or destroyed during chemical reactions.
Who invented electron?
Joseph John Thomson (J. J. Thomson, 1856-1940; see photo at American Institute of Physics) is widely recognized as the discoverer of the electron. Thomson was the Cavendish professor of Experimental Physics at Cambridge University and director of its Cavendish Laboratory from 1884 until 1919.
Is Dalton's theory still accepted today?
Dalton's atomic theory was accepted by many scientists almost immediately. Most of it is still accepted today. However, scientists now know that atoms are not the smallest particles of matter.
What are the similarities and differences between Thomson's and Rutherford's atomic models?
The key difference between Thomson and Rutherford model of atom is that Thomson model of atom does not contain any details about nucleus whereas Rutherford model of atom explains about the nucleus of an atom. J.J. Thomson was the first to discover the subatomic particle called electron in 1904.
What discovered Dalton?
Although a schoolteacher, a meteorologist, and an expert on color blindness, John Dalton is best known for his pioneering theory of atomism. He also developed methods to calculate atomic weights and structures and formulated the law of partial pressures.
