16 Questions
Who proposed a model of the atom in which the electron was able to occupy only certain orbits around the nucleus?
Neils Bohr
Which scientist discovered the proton using a tube filled with hydrogen gas?
Eugene Goldstein
According to John Dalton's postulates, atoms of different elements mix or combine in:
whole number ratios
Who used the gold foil experiment to discover the nucleus?
Ernest Rutherford
Which scientist proposed that atoms are composed of indivisible particles called atoms?
John Dalton
Who discovered the electron and believed that the atom was a solid positive sphere with electrons shoved into the sides of it?
Joseph John (J.J.) Thompson
According to John Dalton's postulates, atoms of the same element are:
identical
Who discovered the neutron?
James Chadwick
Who collected the x-ray spectra of a variety of elements and found that the frequency of x-ray radiation has a precise mathem?
Henry Moseley
Who performed an experiment with a cathode ray tube and discovered the electron?
Joseph John (J.J.) Thompson
Who was the first person to propose the existence of atoms?
Democritus
Which scientist had experimental evidence to support the theory of atoms?
John Dalton
How are elements heavier than iron formed during a supernova?
By a process called neutron capture
Which scientist made significant contributions to the understanding of the atom's structure through experiments with cathode rays?
J.J. Thomson
What did Democritus believe matter was composed of?
Tiny indivisible particles called atoms
How do elements heavier than iron form during a supernova explosion?
By absorbing neutrons released during the supernova
Test your knowledge on the contributions of Ancient Greeks, alchemists, and scientists like J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr to the understanding of the structure of the atom. Explore the main ideas in the discovery of the atomic structure and construct a timeline of other scientists' contributions to the understanding of atoms and elements.
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