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Questions and Answers
What is the definition of the atomic number of an atom?
What is the definition of the atomic number of an atom?
- The number of electrons in the outermost energy level
- The sum of protons and neutrons in the nucleus
- The number of protons in the nucleus (correct)
- The average mass of an atom of an element
What is the term for atoms with the same number of protons but different numbers of neutrons?
What is the term for atoms with the same number of protons but different numbers of neutrons?
- Molecules
- Isomers
- Isobars
- Isotopes (correct)
Who conducted the experiment that led to the discovery of sub-atomic particles?
Who conducted the experiment that led to the discovery of sub-atomic particles?
- Robert Milikan
- William Crooke
- JJ Thomson (correct)
- John Dalton
What is the name of the experiment that led to the discovery of the nucleus of an atom?
What is the name of the experiment that led to the discovery of the nucleus of an atom?
Who suggested the name 'electron' for negatively charged particles?
Who suggested the name 'electron' for negatively charged particles?
What is the Law of Conservation of Mass related to?
What is the Law of Conservation of Mass related to?
What is the purpose of the Maltese Cross experiment?
What is the purpose of the Maltese Cross experiment?
What is the definition of the relative atomic mass of an element?
What is the definition of the relative atomic mass of an element?
Who developed the Bohr model of the atom?
Who developed the Bohr model of the atom?
What is the primary difference between the atomic number and the mass number of an atom?
What is the primary difference between the atomic number and the mass number of an atom?
Which scientist's experiment led to the conclusion that sub-atomic particles exist?
Which scientist's experiment led to the conclusion that sub-atomic particles exist?
What is the significance of the oil drop experiment conducted by Robert Milikan?
What is the significance of the oil drop experiment conducted by Robert Milikan?
What is the primary characteristic of isotopes of an element?
What is the primary characteristic of isotopes of an element?
What is the main conclusion drawn from the results of Ernest Rutherford's alpha-particle scattering experiment?
What is the main conclusion drawn from the results of Ernest Rutherford's alpha-particle scattering experiment?
What is the principle on which a mass spectrometer operates?
What is the principle on which a mass spectrometer operates?
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