10 Questions
What is the atomic number or charge number related to?
Number of protons
Which subatomic particles are found in the nucleus of an atom?
Protons and neutrons
In a free state, how does the atom generally exist?
As a molecule
What did J.J. Thomson's experiments in 1897 reveal about atoms?
Presence of electrons in atoms
What does the atomic mass of an element represent?
Number of protons and neutrons
What did J.J. Thomson use to detect incident rays in his cathode ray tube?
A layer of phosphorescent paint
How did Thomson determine the charge-to-mass ratio (e/m) of cathode rays?
By measuring their deflection under a magnetic field and their kinetic energy
What is the formula for the force experienced by a charged particle in an electric field E?
$FE = qE = - eE$
What is the formula for the kinetic energy K.E. of an electron?
$K.E. = (1/2).m.v^2$
What force is sometimes called fluid resistance in Millikan's experiment?
$Fs=6Πηr.v$ (drag force or stock force)
Test your knowledge about the structure of atoms with this quiz. Questions cover topics such as atomic number, mass number, and examples of atoms.
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