chemistry atomic theory test

Who was the first person to theorize that all matter was composed of atoms?​ ​ (a)  

• Democritus
• Ernest Rutherford
• Electron
• John Dalton
• J.J. Thomson

Which scientist is primarily attributed to come up with the Law of Conservation of Matter?​ (a)  

• John Dalton
• Electron
• Democritus
• Ernest Rutherford
• J.J. Thomson

This scientist was the first to theorize that atoms were not solid, and positive particles were part of the atom.​ (a)  

• J.J. Thomson
• Ernest Rutherford
• Democritus
• Electron
• John Dalton

Who indirectly discovered the nucleus by shooting alpha particles into a thin gold sheet?​ (a)  

• Ernest Rutherford
• Democritus
• Electron
• John Dalton
• J.J. Thomson

What was the first part of the atom to be discovered?​ (a)  

• Electron
• Ernest Rutherford
• Democritus
• John Dalton
• J.J. Thomson

Who is credited with the discovery of the electron, a subatomic particle found outside the atomic nucleus?

• John Dalton

• J.J. Thomson

• Ernest Rutherford

• Neils Bohr

Which of the following statements best describes Dalton's atomic theory?

• Atoms are indivisible and indestructible

• Atoms are composed of electrons, protons, and neutrons

• Atoms can combine to form molecules

• Atoms are primarily empty space

What is the name of the experiment conducted by Rutherford that led to the discovery of the atomic nucleus?

• Double-sit experiment

• Gold Foil experiment

• Cathode ray tube experiment

• Photoelectric effect experiment

 

Which subatomic particle has a positive charge and is located in the nucleus of an atom?

• Electron

• Neutron

• Proton

• Photon

 

Who proposed the planetary model of the atom, where electrons orbit the nucleus in specific energy levels or shells?

• John Dalton

• Robert Boyle

• Dmitri Mendeleev

• Niels Bohr