11 Questions
What was the outcome of using the calculated charge of the electron?
A more accurate determination of the elementary charge
What was the result of Rutherford's experiment involving alpha particles and gold foil?
Some alpha particles bounced back, challenging prevailing atomic models
What did Chadwick's 1932 experiment involve?
Bombarding beryllium with alpha particles
What is the law of multiple proportions?
The masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers
What was Rutherford's 1920 postulation?
The existence of a 'neutral doublet' in atomic nuclei
What was the significance of the use of cathode-ray tubes in the discovery of electrons?
It helped to determine the charge-to-mass ratio of electrons
What is true about electromagnetic waves?
They can travel through empty space
What is the 'plum pudding model' of the atom?
A model where electrons are randomly dispersed within a positive charge cloud
What was the method used by Millikan to determine the charge of an electron?
By tracking the motion of oil droplets suspended in an electric field
What is the significance of the fact that H2O is always 1:8 Hydrogen to Oxygen by mass?
It demonstrates that the composition of a compound is always the same
What is the significance of the discovery of electrons?
It changed the understanding of the structure of atoms
Test your understanding of the fundamental principles of chemistry, including the laws of definite proportions and multiple proportions. Learn how compounds are composed and how elements combine to form different compounds.
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