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Modern atomic theory is generally credited to John Dalton, who first proposed the 5 laws of atomic theory:
1. Elements are composed of atoms
2. All atoms of an element are identical and have the same mass
3. Atoms of different elements have different weights
4. Elements combine to form compounds in fixed ratios
5. Atoms cannot be created, divided, or destroyed (conservation of mass)- chemical reactions only rearrange them
Through approximately the last two centuries since Dalton published his atomic theory, many scientists, such as Thomson, Rutherford, Bohr, de Broglie, and others, have expanded upon and developed the model of the atom into the one we use today. For example, Rutherford created a planetary model (which was later revised), while de Broglie proposed that subatomic particles behave like waves. These scientists each discovered something new that improved the model, but no one scientist is credited with completely inventing a perfect atomic model.
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Who is a Russian chemist who came up with the first bubble theory which he called and ldquoprimary a biogenesis?
Aleksandr Oparin was the Russian chemist who developed the first bubble theory of cell formation, which he called "primary biogenesis." His theory proposed that life could have originated from simple organic compounds in Earth's early environment.
Which came first, animals or plants?
Plants came first before animals.
Which came first, plants or animals?
Plants came first before animals.
What is the theory of evolution and who stated it?
The theory of evolution tells us that all life came from single cell organisms that over time evolved into the multi-cellular life forms that we see today. For this theory to work a long amount of time is necessary and mutations that are beneficial to an organism. Evolution also can't tell us where the material for the first multi-cellular organisms came from. Evolutionists talk about the 'big bang' but again can't explain where the material that went bang came from.
Which organelle came first, mitochondria or chloroplasts?
Mitochondria came first before chloroplasts in the evolution of eukaryotic cells.
What scientists came up with the first widely recognized atomic theory?
The first widely recognized atomic theory was proposed by John Dalton in the early 19th century. Dalton's atomic theory suggested that all matter is made up of small, indivisible particles called atoms. This theory laid the foundation for modern chemistry.
Who was democritus?
democritus was greek philosophers.
How does Dalton's model of the atomic theory agree with models that came before it?
Dalton's atomic theory built upon earlier models by proposing that matter is composed of indivisible particles called atoms, each with specific characteristics. This idea aligned with earlier theories that also described matter as consisting of tiny, fundamental building blocks. Dalton's model provided a more comprehensive explanation by incorporating new experimental observations and proposing that atoms combine in simple whole number ratios to form compounds.
How does Dalton's model of the atomic theory differ from the models that came before it?
You did not specify but seeing as my course is currently specifying in this field I have at least minimalist credentials in laments... Older models had electrons following an orbit which is frankly not true, modern day electron cloud models show that they are roughly here whereas for instance, the Bohr model shows them following a strict orbit
What did Albert Einstein do to help?
He invented atomic power He came up with the theory of Relativity. He came up with the theory of Gravity. He had all these equations like E=mc2
What did henrey mosley contribute to the peridic table?
he came up with the theory of atomic numbers
Which postulate of Dalton atomic theory came from the low of constant proportions given by Proust?
atoms combine in whole numbers.
Who was the first to describe the cell theory?
Two scientists came up with The Cell Theory. It was in 1839, Matthias Schleidan and Theodor Schwann, two German Biologists came up with this theory.
Who comes first an egg or a hen?
Based on evolutionary theory, the egg came first.
What was max planck major contribution to the atomic theory?
I don't know of atomic theory, but he came up with the idea that light energy acted like packetts of energy that he called photons. Thru some theoretical calculations he came up with Plank's constant that deals with the energy of different wavelengths of light.
Which came first the theory of natural selection or the theory of relativity or the heliocentric theory or the theory of the the hydrogen atom?
In the following order: Heliocentric theory of the solar system (Aristarchus of Samos, 270 BCE) Natural Selection (Darwinian evolution, 1858) Theory of the hydrogen atom (as a small negatively charged particle inside a larger positively charged particle, 1904, the plum pudding model) Theory of relativity (special relativity, 1905) Theory of relativity (general relativity's initial paper on the acceleration of objects within the framework of special relativity, 1907) Theory of the hydrogen atom (as a small particle orbiting the atomic nucleus, 1909, the Rutherford or Planetary model) Theory of the hydrogen atom (as an "electron cloud" surrounding the atomic nucleus, 1913, the quantum mechanical or Bohr model) Theory of relativity (general relativity and its ability to warp space-time, 1915) So heliocentrism was, by about two millenia, the first. Relativity and the model of the hydrogen atom are intricately intertwined, so which came first depends on what you mean specifically.
When did they came up the theory of atoms?
The pre-modern idea of atomic theory was proposed by Greek thinkers like Democritus, Leucippus, and the Epicureans, which would have been at about 500 to 300 BC.
