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WorksheetsStructure of the Atom
Total questions: 20
Worksheet time: 15mins
What is the fundamental building block of matter?
Molecules
Elements
Atoms
Particles
Why did scientists at the end of the 19th century need to reveal the structure of the atom?
To develop new technologies
To understand the properties of electricity
To explain the nature of charged particles
To create a new chemical element
Who discovered the presence of positively charged canal rays?
J.J. Thomson
E. Goldstein
Ernest Rutherford
Dalton
What sub-atomic particle did E. Goldstein discover?
What is the charge of a proton?
According to Thomson's model of an atom, where are electrons embedded?
What was the major drawback of Thomson's model of an atom?
Who conducted the famous alpha-particle scattering experiment?
What was the unexpected result of Rutherford's alpha-particle scattering experiment?
According to Rutherford's nuclear model, where is the majority of an atom's mass located?
What is the radius of the nucleus compared to the size of the atom in Rutherford's model?
Who is known as the "Father" of nuclear physics and conducted the gold foil experiment?
What is the main reason for the failure of Dalton's atomic theory?
What is the charge of a neutron?
What did Rutherford's model of an atom propose about the nucleus?
Which particle has the largest mass in an atom?
What did Rutherford's gold foil experiment conclude about the positive charge in an atom?
What was the unexpected result of Rutherford's experiment with alpha-particles?
What did Rutherford conclude about the size of the nucleus compared to the atom?
Which sub-atomic particle was discovered before the electron?
Proton
Neutron
Photon
Positron
