12 Questions
What did E. Goldstein discover in 1886?
The presence of canal rays in a gas discharge
What is the charge of a proton represented as?
Plus one (+1)
What is the mass of an electron considered to be?
Negligible
Where were the protons believed to be located within the atom?
In the interior of the atom
What did Rutherford conclude from the α-particle scattering experiment?
A very small fraction of α-particles were deflected by 1800, indicating that all the positive charge and mass of the gold atom were concentrated in a very small volume within the atom.
What did Rutherford calculate about the radius of the nucleus based on his experiment?
The radius of the nucleus is about 105 times less than the radius of the atom.
What is a drawback of Rutherford’s model of the atom?
Any particle in a circular orbit would undergo acceleration, causing it to lose energy and fall into the nucleus.
What feature did Rutherford's nuclear model propose?
There is a positively charged centre in an atom called the nucleus. Nearly all the mass of an atom resides in the nucleus.
What is the mass number defined as?
The total number of protons and neutrons in the nucleus of an atom
How is the atomic number denoted?
By the letter 'Z'
If the number of protons in an atom is 6, what is its atomic number?
6
What determines the atomic number of an atom?
The number of protons in the nucleus
Test your knowledge about electric charge and atomic structure with this quiz. Explore the concepts of charged particles in atoms and the contributions of various scientists in understanding atomic structure.
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