6 Questions
What did Bohr suggest about the electrons in his model of the atom?
Electrons orbit the nucleus in defined shells.
What is the maximum number of electrons that can occupy the third energy shell in an atom?
18
What is the mass number of an atom if it contains 20 protons and 22 neutrons?
42
Which subatomic particle was discovered by James Chadwick?
Neutrons
What does the atomic number of an element represent?
The number of protons in the nucleus.
Which model suggested that atoms are made up of a positively charged nucleus surrounded by electrons in specific energy levels?
Bohr model
Test your knowledge on the evolution of atomic models from the initial belief of undividable spheres to the modern Bohr model. Topics include Plum Pudding model, nuclear model, alpha particle scattering experiment, and Bohr's theory of electron shells.
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