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Modern scientists expanded upon the atomic theory by incorporating concepts from quantum mechanics, which introduced the idea that particles like electrons exhibit both wave-like and particle-like properties. They also recognized that atoms are not indivisible; instead, they consist of subatomic particles—protons, neutrons, and electrons. Additionally, the concept of isotopes emerged, highlighting that atoms of the same element can have different masses due to varying numbers of neutrons. These developments enhanced the understanding of atomic structure, behavior, and interactions.
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Sir William crooks and the atomic theory?
Sir William Crookes was a British chemist and physicist who made significant contributions to the field of atomic theory. He is best known for his work on cathode rays, which eventually led to the discovery of the electron. Crookes' experiments with cathode rays provided crucial evidence for the existence of subatomic particles and helped lay the foundation for modern atomic theory.
How does periodic table evolved?
The periodic table has evolved over time through the contributions of various scientists, including Dmitri Mendeleev and Henry Moseley. It started as a list of known elements organized by atomic weight and properties, then transformed into the modern version based on atomic number and electron configuration. New elements have been discovered and added to the table as technology advanced.
Where should the neutrons be added to this atomic model?
With the protons
What trends do you notice about the atomic number and atomic mass as you move left to right across the table?
they increase by one going from left to right totally a guess
Why does the atomic radius change as electrons are added to a shell?
The atomic radius decreases as electrons are added to a shell because the increasing number of electrons increases the electrostatic force of attraction between the electrons and the nucleus, pulling the electrons closer to the nucleus and reducing the atomic radius.
What is the independent variable in the first atomic lab theory?
color of salt added to the container
Sir William crooks and the atomic theory?
Sir William Crookes was a British chemist and physicist who made significant contributions to the field of atomic theory. He is best known for his work on cathode rays, which eventually led to the discovery of the electron. Crookes' experiments with cathode rays provided crucial evidence for the existence of subatomic particles and helped lay the foundation for modern atomic theory.
Did Bohr improved upon Dalton's atomic theory?
Yes, Bohr's atomic theory built upon Dalton's atomic theory by introducing the concept of energy levels and electrons moving in specific orbits around the nucleus. He also added the idea of quantized electronic transitions, which helped explain the spectral lines observed in atomic spectra.
How does periodic table evolved?
The periodic table has evolved over time through the contributions of various scientists, including Dmitri Mendeleev and Henry Moseley. It started as a list of known elements organized by atomic weight and properties, then transformed into the modern version based on atomic number and electron configuration. New elements have been discovered and added to the table as technology advanced.
What three scientists helped out with the cell theory?
The cell theory was developed by three scientists: Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. Schleiden and Schwann proposed that all living things are composed of cells, while Virchow added that cells arise from pre-existing cells.
Is the cell theory is the result of the hypothesis and observation of one person?
no,because in celltheory there r 3 points .three scientists added one one point
What did John Dalton do in 1803?
In 1803, John Dalton published his atomic theory, which proposed that all matter is made up of small, indivisible particles called atoms. This theory laid the foundation for modern chemistry and is considered a significant contribution to the field of science.
Who were the scientists who developed cell theory and what did they contribute?
The scientists credited with developing cell theory include Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. Schleiden and Schwann proposed that all living organisms are composed of cells, while Virchow added the concept that cells arise from pre-existing cells. Together, their contributions laid the foundation for modern cell biology.
What three scientists invented the cell theory?
The three scientists who contributed to the development of the cell theory are Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. Schleiden and Schwann proposed that cells are the basic unit of life, while Virchow added the concept that cells arise from pre-existing cells.
What is an example of atomic mass?
The Atomic Mass is the number of electrons and protons and neutrons added together.
Where should the neutrons be added to this atomic model?
With the protons
Who added ideas to the cell theory?
Virchow
