Atomic Theory Models Quiz

Play an AI-generated podcast conversation about this lesson

What was the attempt of the Thomson model in atomic theory?

To prove that atoms are composed entirely of electrons

To disprove the existence of positively charged particles in atoms

To reconcile the discovery of the electron with the knowledge that atoms had a net charge of zero (correct)

To reconcile the discovery of the electron with the knowledge that atoms had a net charge of one

What did the Rutherford model conclude about the distribution of positive charges in an atom?

They are located in the nucleus only

They are concentrated in a small region of space (correct)

They are absent in the atom

They are uniformly distributed throughout the atom

How did the Bohr model build upon the Rutherford model's description of the atom?

By proposing that there are multiple nuclei in an atom

By denying the existence of electrons

By claiming that electrons occupy fixed positions in the nucleus

By introducing the concept of orbiting electrons around a positively charged nucleus (correct)

What was the major flaw in the Plum Pudding Model according to Rutherford's findings?

Insufficient electrostatic repulsion to overcome the momentum of alpha particles Signup and view all the answers

What significant evidence led Rutherford to conclude that positive charges must be concentrated in a small region of space within an atom?

The redirection of alpha particles in their original direction Signup and view all the answers

What is the process by which two nuclei fuse to create a heavier nuclei?

Nuclear fusion Signup and view all the answers

What model describes electrons as a particle with wave-like properties that can be found in certain regions with a high probability?

Quantum mechanical model Signup and view all the answers

What is the arrangement of elements by atomic number called?

Periodic table Signup and view all the answers

What determines the chemical reactivity of an atom?

Valence shell electron configuration Signup and view all the answers

What is used to show the distribution of electrons among various orbitals of an atom and can help predict an element’s chemical properties?

Electron configuration Signup and view all the answers

Which scientist correctly realized that electrons do not exist in predictable orbits, but rather in probability-based orbitals?

Niels Bohr Signup and view all the answers

Who discovered the negatively charged electrons by performing the cathode ray tube experiments?

JJ Thomson Signup and view all the answers

Which scientist's model incorrectly assumed that atoms of different elements had different shapes that gave them different properties?

John Dalton Signup and view all the answers

Who figured out that the electrons were in quantized energy 'orbits' around the nucleus, mathematically bringing stability to Rutherford’s model?

Niels Bohr Signup and view all the answers

Which scientist's model would have been unstable due to its limitations, as it didn’t know about the nucleus or electron orbitals?

JJ Thomson Signup and view all the answers

Who discovered the neutron?

James Chadwick Signup and view all the answers

What was missing in the plum pudding model?

Neutrons Signup and view all the answers

Who experimented with very thin sheets of gold to study the structure of an atom?

Ernest Rutherford Signup and view all the answers

How is the current electron cloud model an improvement of the Bohr model?

It provides a complete explanation of electron behavior Signup and view all the answers

How did use of the CRT impact the Modern Atomic Theory?

It led to the discovery of electrons Signup and view all the answers