Podcast
Questions and Answers
Who first proposed the concept of the atom?
Who first proposed the concept of the atom?
- Democritus (correct)
- Rutherford
- Bohr
- J.J Thompson
What is the meaning of the term 'atom'?
What is the meaning of the term 'atom'?
- Small invisible particles (correct)
- Continuous matter
- Greek philosopher
- Non-living organisms
According to John Dalton, what is true about all elements?
According to John Dalton, what is true about all elements?
- Composed of atoms (correct)
- Only exist in living organisms
- Have different types of atoms
- Composed of molecules
Which scientist proposed that atoms are constantly moving and cannot be destroyed?
Which scientist proposed that atoms are constantly moving and cannot be destroyed?
What happens to atoms in a chemical reaction according to John Dalton's theory?
What happens to atoms in a chemical reaction according to John Dalton's theory?
Who among the scientists mentioned contributed to the development of concepts on atoms?
Who among the scientists mentioned contributed to the development of concepts on atoms?
What did Ernest Rutherford discover in 1909 through his alpha scattering experiment?
What did Ernest Rutherford discover in 1909 through his alpha scattering experiment?
What did Ernest Rutherford name the positive charged particles he found concentrated in the nucleus?
What did Ernest Rutherford name the positive charged particles he found concentrated in the nucleus?
In terms of charge quantity, how do protons compare to electrons?
In terms of charge quantity, how do protons compare to electrons?
What was one major problem left unsolved by Rutherford's model of atomic structure?
What was one major problem left unsolved by Rutherford's model of atomic structure?
Who provided proof for the existence of neutrons in the atomic nucleus?
Who provided proof for the existence of neutrons in the atomic nucleus?
How does the mass ratio between helium and hydrogen atoms compare to what was originally expected?
How does the mass ratio between helium and hydrogen atoms compare to what was originally expected?
What happens when electrons jump from higher to lower orbits?
What happens when electrons jump from higher to lower orbits?
What does the Bohr Model fail to explain regarding spectral lines?
What does the Bohr Model fail to explain regarding spectral lines?
Why is Bohr's model limited to only working for hydrogen atom?
Why is Bohr's model limited to only working for hydrogen atom?
What concept regarding electron orbits in atoms was postulated by Bohr's model?
What concept regarding electron orbits in atoms was postulated by Bohr's model?
Which physicist developed the idea that electromagnetic radiation has discreet energies?
Which physicist developed the idea that electromagnetic radiation has discreet energies?
What does the Planck constant relate to according to the text?
What does the Planck constant relate to according to the text?
Which subatomic particle has no charge?
Which subatomic particle has no charge?
Which subatomic particle is located outside the nucleus?
Which subatomic particle is located outside the nucleus?
What is the relative mass of a proton?
What is the relative mass of a proton?
Which subatomic particle is responsible for stabilizing the nucleic charge?
Which subatomic particle is responsible for stabilizing the nucleic charge?
What is the atomic number of an element?
What is the atomic number of an element?
Which subatomic particle has the smallest actual mass?
Which subatomic particle has the smallest actual mass?
Who discovered the electron and how?
Who discovered the electron and how?
What charge-to-mass ratio did J.J. Thomson calculate for an individual electron?
What charge-to-mass ratio did J.J. Thomson calculate for an individual electron?
Which scientist determined the charge of the electron with great precision?
Which scientist determined the charge of the electron with great precision?
What is the mass of an electron according to the data provided?
What is the mass of an electron according to the data provided?
What model of the atom did J.J. Thomson propose based on his experiments?
What model of the atom did J.J. Thomson propose based on his experiments?
What was the purpose of applying electric and magnetic fields to a beam of electrons in the cathode ray tube experiment?
What was the purpose of applying electric and magnetic fields to a beam of electrons in the cathode ray tube experiment?
