Simple history of atom Flashcards
(27 cards)
Fill in the blank: __________ discovered the neutron in 1932.
James Chadwick
Who proposed the first atomic theory?
John Dalton
True or False: J.J. Thomson discovered the neutron.
False
Fill in the blank: Ernest Rutherford is known for the _____ experiment.
gold foil
What did Niels Bohr introduce to the atomic model?
electron orbits
Which scientist is associated with the discovery of the electron?
J.J. Thomson
What year did John Dalton publish his atomic theory?
1803
Multiple Choice: Who discovered the nucleus?
A) Ernest Rutherford
True or False: The atomic model has remained unchanged since Dalton’s time.
False
What is the main contribution of Dmitri Mendeleev to atomic science?
Periodic table
Fill in the blank: The _____ model describes electrons in fixed orbits around the nucleus.
Bohr
What did Rutherford conclude about the structure of the atom?
Atoms have a small, dense nucleus.
Which particle did J.J. Thomson identify?
electron
Multiple Choice: Which of the following is NOT an atomic scientist?
C) Albert Einstein
What did Dalton believe about atoms?
Atoms are indivisible and indestructible.
True or False: Mendeleev’s periodic table was based on atomic mass.
True
Fill in the blank: The _____ model of the atom was proposed by Niels Bohr.
planetary
What is the primary focus of Rutherford’s gold foil experiment?
To investigate the structure of the atom.
Who is known for the wave model of the atom?
Louis de Broglie
What did Mendeleev predict about undiscovered elements?
Their properties based on periodic trends.
Multiple Choice: Which scientist’s work led to the understanding of the quantum model?
B) Niels Bohr
True or False: Dalton’s atomic theory included the concept of isotopes.
False
Fill in the blank: The _____ is the central part of an atom.
nucleus
What did Bohr’s model explain about electron energy levels?
Electrons occupy fixed energy levels.
