12 Questions
What occurs when atoms gain or lose electrons to increase their stability?
They become charged entities called ions
What is the primary reason for the unique characteristics of different elements?
The different numbers of protons and electrons in their atoms
Which scientist's work led to the discovery of subatomic particles?
J.J. Thomson
What is the purpose of the vacuum pump in the cathode ray experiment?
To maintain a partial vacuum
What is the result of chemical reactions according to Dalton's atomic theory?
A rearrangement of atoms to form products
What is the significance of Dalton's atomic theory?
It explained the Laws of chemical reactions
What is the main function of electrons in an atom?
To revolve around the centre of the nucleus
Who is credited with proposing the first scientific theory of atomic structure?
John Dalton
What is the atomic number of an element determined by?
The total number of protons in its nucleus
Which of the following is NOT a component of the atomic structure of matter?
Molecules
What is the significance of the study of atomic structure?
It provides a basis for understanding the entire class of chemical reactions and bonds
What is the characteristic of a neutral atom?
It has equal numbers of protons and electrons
Test your knowledge of the structure of an atom, including the nucleus, protons, neutrons, and electrons. Learn about the history of atomic structure and quantum mechanics, from Democritus to modern times.
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